121-449: Galileo Galilei (1564–1642) was a scientist and philosopher. Galileo may also refer to: Galileo Galilei Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei ( / ˌ ɡ æ l ɪ ˈ l eɪ oʊ ˌ ɡ æ l ɪ ˈ l eɪ / , US also / ˌ ɡ æ l ɪ ˈ l iː oʊ -/ ; Italian: [ɡaliˈlɛːo ɡaliˈlɛːi] ) or mononymously as Galileo ,
242-439: A humid subtropical climate ( Cfa ), tending to Mediterranean ( Csa ). It has hot summers with moderate or light rainfall and cool, damp winters. As Florence lacks a prevailing wind, summer temperatures are higher than along the coast. Rainfall in summer is convectional , while relief rainfall dominates in the winter. Snow is rare. The highest officially recorded temperature was 42.6 °C (108.7 °F) on 26 July 1983 and
363-724: A secundogeniture of the Habsburg-Lorraine dynasty, who were deposed for the House of Bourbon-Parma in 1801. From 1801 to 1807 Florence was the capital of the Napoleonic client state Kingdom of Etruria . The Bourbon-Parma were deposed in December 1807 when Tuscany was annexed by France . Florence was the prefecture of the French département of Arno from 1808 to the fall of Napoleon in 1814. The Habsburg-Lorraine dynasty
484-529: A Roman city, and later, after a long period as a flourishing trading and banking medieval commune , it was the birthplace of the Italian Renaissance . It was politically, economically, and culturally one of the most important cities in Europe and the world from the 14th to 16th centuries. The language spoken in the city during the 14th century came to be accepted as the model for what would become
605-621: A book on the subject, encouraged by the election of Cardinal Maffeo Barberini as Pope Urban VIII in 1623. Barberini was a friend and admirer of Galileo, and had opposed the admonition of Galileo in 1616. Galileo's resulting book, Dialogue Concerning the Two Chief World Systems , was published in 1632, with formal authorization from the Inquisition and papal permission. Earlier, Pope Urban VIII had personally asked Galileo to give arguments for and against heliocentrism in
726-602: A brief treatise entitled Sidereus Nuncius ( Starry Messenger ). On 30 November 1609, Galileo aimed his telescope at the Moon . While not being the first person to observe the Moon through a telescope (English mathematician Thomas Harriot had done so four months before but only saw a "strange spottednesse"), Galileo was the first to deduce the cause of the uneven waning as light occlusion from lunar mountains and craters . In his study, he also made topographical charts, estimating
847-611: A debate with Galileo, sending him an essay disputing the Copernican system. Galileo later stated that he believed this essay to have been instrumental in the action against Copernicanism that followed. Ingoli may have been commissioned by the Inquisition to write an expert opinion on the controversy, with the essay providing the basis for the Inquisition's actions. The essay focused on eighteen physical and mathematical arguments against heliocentrism. It borrowed primarily from Tycho Brahe's arguments, notably that heliocentrism would require
968-585: A fair sector of Florence's economy. The city's income relies partially on services and commercial and cultural interests, such as annual fairs, theatrical and lyrical productions, art exhibitions, festivals and fashion shows, such as the Calcio Fiorentino . Heavy industry and machinery also take their part in providing an income. In Nuovo Pignone, numerous factories are still present, and small-to medium industrial businesses are dominant. The Florence-Prato-Pistoia industrial districts and areas were known as
1089-409: A friend of Galileo, included a realistic depiction of the Moon in one of his paintings; he probably used his own telescope to make the observation. On 7 January 1610, Galileo observed with his telescope what he described at the time as "three fixed stars, totally invisible by their smallness", all close to Jupiter, and lying on a straight line through it. Observations on subsequent nights showed that
1210-487: A genuinely pious Catholic, Galileo fathered three children out of wedlock with Marina Gamba . They had two daughters, Virginia (born 1600) and Livia (born 1601), and a son, Vincenzo (born 1606). Due to their illegitimate birth, Galileo considered the girls unmarriageable, if not posing problems of prohibitively expensive support or dowries, which would have been similar to Galileo's previous extensive financial problems with two of his sisters. Their only worthy alternative
1331-626: A legitimization of political expediency and even malpractice. Machiavelli was a political thinker, renowned for his political handbook The Prince , which is about ruling and exercising power. Commissioned by the Medici, Machiavelli also wrote the Florentine Histories , the history of the city. In 1512, the Medici retook control of Florence with the help of Spanish and Papal troops. They were led by two cousins, Giovanni and Giulio de' Medici , both of whom would later become Popes of
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#17327878573981452-600: A location in the Piazza del Duomo. In October 2021, Florence was shortlisted for the European Commission 's 2022 European Capital of Smart Tourism award along with Bordeaux , Copenhagen , Dublin , Ljubljana , Palma de Mallorca and Valencia . Food and wine have long been an important staple of the economy. The Chianti region is just south of the city, and its Sangiovese grapes figure prominently not only in its Chianti Classico wines but also in many of
1573-537: A lutenist and composer who added to Galileo's financial burdens for the rest of his life. Michelangelo was unable to contribute his fair share of their father's promised dowries to their brothers-in-law, who later attempted to seek legal remedies for payments due. Michelangelo also occasionally had to borrow funds from Galileo to support his musical endeavours and excursions. These financial burdens may have contributed to Galileo's early desire to develop inventions that would bring him additional income. When Galileo Galilei
1694-401: A method for measuring the apparent size of a star without a telescope. As described in his Dialogue Concerning the Two Chief World Systems , his method was to hang a thin rope in his line of sight to the star and measure the maximum distance from which it would wholly obscure the star. From his measurements of this distance and of the width of the rope, he could calculate the angle subtended by
1815-568: A pamphlet, An Astronomical Disputation on the Three Comets of the Year 1618 , which discussed the nature of a comet that had appeared late in November of the previous year. Grassi concluded that the comet was a fiery body that had moved along a segment of a great circle at a constant distance from the earth, and since it moved in the sky more slowly than the Moon, it must be farther away than
1936-511: A position of enormous influence in Italy, Europe, and beyond. Its turbulent political history includes periods of rule by the powerful Medici family and numerous religious and republican revolutions. From 1865 to 1871 the city served as the capital of the Kingdom of Italy . The Florentine dialect forms the base of standard Italian and it became the language of culture throughout Italy due to
2057-643: A powerful argument against both the Ptolemaic system and the geoheliocentric system of Tycho Brahe. A dispute over claimed priority in the discovery of sunspots, and in their interpretation, led Galileo to a long and bitter feud with the Jesuit Christoph Scheiner . In the middle was Mark Welser , to whom Scheiner had announced his discovery, and who asked Galileo for his opinion. Both of them were unaware of Johannes Fabricius ' earlier observation and publication of sunspots. Galileo observed
2178-502: A practical use for his discovery. Determining the east–west position of ships at sea required their clocks be synchronized with clocks at the prime meridian . Solving this longitude problem had great importance to safe navigation and large prizes were established by Spain and later Holland for its solution. Since eclipses of the moons he discovered were relatively frequent and their times could be predicted with great accuracy, they could be used to set shipboard clocks and Galileo applied for
2299-493: A programme of spraying church steps with water to prevent tourists from using such areas as picnic spots. While he values the benefits of tourism, he claims that there has been "an increase among those who sit down on church steps, eat their food and leave rubbish strewn on them", he explained. To boost the sale of traditional foods, the mayor had introduced legislation (enacted in 2016) that requires restaurants to use typical Tuscan products and rejected McDonald's application to open
2420-443: A result. In 2015, Mayor Dario Nardella expressed concern over visitors who arrive on buses, stay only a few hours, spend little money but contribute significantly to overcrowding. "No museum visit, just a photo from the square, the bus back and then on to Venice ... We don't want tourists like that", he said. Some tourists are less than respectful of the city's cultural heritage, according to Nardella. In June 2017, he instituted
2541-523: A thing. Compounding this problem, other astronomers had difficulty confirming Galileo's observations. When he demonstrated the telescope in Bologna, the attendees struggled to see the moons. One of them, Martin Horky, noted that some fixed stars, such as Spica Virginis , appeared double through the telescope. He took this as evidence that the instrument was deceptive when viewing the heavens, casting doubt on
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#17327878573982662-431: A vast patronage network along with his alliance to the new immigrants, the gente nuova (new people). The fact that the Medici were bankers to the pope also contributed to their ascendancy. Cosimo was succeeded by his son Piero , who was, soon after, succeeded by Cosimo's grandson, Lorenzo in 1469. Lorenzo was a great patron of the arts, commissioning works by Michelangelo , Leonardo da Vinci and Botticelli . Lorenzo
2783-1227: Is a major national economic centre, as well as a tourist and industrial hub. Firenze comes from Florentiae , locative form of Florentia , in turn a name conveying good luck, from Latin : florēre , lit. 'to blossom'. Roman Republic , 59–27 BC Roman Empire , 27 BC–AD 285 Western Roman Empire , 285–476 Kingdom of Odoacer , 476–493 Ostrogothic Kingdom , 493–553 Eastern Roman Empire , 553–568 Lombard Kingdom , 570–773 Carolingian Empire , 774–797 Regnum Italiae , 797–1001 March of Tuscany , 1002–1115 [REDACTED] Republic of Florence , 1115–1532 [REDACTED] Duchy of Florence , 1532–1569 [REDACTED] Grand Duchy of Tuscany , 1569–1801 [REDACTED] Kingdom of Etruria , 1801–1807 [REDACTED] First French Empire , 1807–1815 [REDACTED] Grand Duchy of Tuscany , 1815–1859 [REDACTED] United Provinces of Central Italy , 1859–1860 [REDACTED] Kingdom of Italy , 1861–1943 [REDACTED] Italian Social Republic , 1943–1945 [REDACTED] Italy , 1946–present Florence originated as
2904-466: Is a major production and commercial centre in Italy, where the Florentine industrial complexes in the suburbs produce all sorts of goods, from furniture, rubber goods, chemicals, and food. Traditional and local products, such as antiques, handicrafts, glassware, leatherwork, art reproductions, jewellery, souvenirs, elaborate metal and iron-work, shoes, accessories and high fashion clothes also occupy
3025-469: Is particularly strong, with world-renowned museums such as the Uffizi selling over 1.93 million tickets in 2014. The city's convention centre facilities were restructured during the 1990s and host exhibitions, conferences, meetings, social forums, concerts and other events. In 2016, Florence had 20,588 hotel rooms in 570 facilities. International visitors use 75% of the rooms; some 18% of those were from
3146-672: Is the capital city of the Italian region of Tuscany . It is also the most populated city in Tuscany, with 364,073 inhabitants in 2024, and 990,527 in its metropolitan area . Florence was a centre of medieval European trade and finance and one of the wealthiest cities of that era. It is considered by many academics to have been the birthplace of the Renaissance , becoming a major artistic, cultural, commercial, political, economic and financial center. During this time, Florence rose to
3267-446: Is the most significant industry in central Florence. From April to October, tourists outnumber the local population. Tickets to the Uffizi and Accademia galleries are regularly sold out and large groups regularly fill the basilicas of Santa Croce and Santa Maria Novella , both of which charge for entry. Tickets for The Uffizi and Accademia can be purchased online prior to visiting. In 2010, readers of Travel + Leisure magazine ranked
3388-607: The Dialogue , his final interrogation, in July 1633, concluded with his being threatened with torture if he did not tell the truth, but he maintained his denial despite the threat. The sentence of the Inquisition was delivered on 22 June. It was in three essential parts: According to popular legend, after recanting his theory that the Earth moved around the Sun, Galileo allegedly muttered
3509-584: The Duchy of Florence ) on 15 February 1564, the first of six children of Vincenzo Galilei , a leading lutenist , composer, and music theorist , and Giulia Ammannati , the daughter of a prominent merchant, who had married two years earlier in 1562, when he was 42, and she was 24. Galileo became an accomplished lutenist himself and would have learned early from his father a skepticism for established authority. Three of Galileo's five siblings survived infancy. The youngest, Michelangelo (or Michelagnolo), also became
3630-577: The Florentine Academy , he presented two lectures, On the Shape, Location, and Size of Dante's Inferno , in an attempt to propose a rigorous cosmological model of Dante's hell . Being inspired by the artistic tradition of the city and the works of the Renaissance artists , Galileo acquired an aesthetic mentality . While a young teacher at the Accademia, he began a lifelong friendship with
3751-731: The Italian Social Republic . Hitler declared it an open city on 3 July 1944 as troops of the British 8th Army closed in. Except for the Ponte Vecchio , in early August, the retreating Germans decided to demolish all the bridges along the Arno linking the district of Oltrarno to the rest of the city, making it difficult for troops of the 8th Army to cross. Florence was liberated by New Zealand , South African and British troops on 4 August 1944 alongside partisans from
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3872-510: The Italian language . Thanks especially to the works of the Tuscans Dante , Petrarch and Boccaccio , the Florentine dialect, above all the local dialects, was adopted as the basis for a national literary language. Starting from the late Middle Ages , Florentine money—in the form of the gold florin —financed the development of industry all over Europe, from Britain to Bruges , to Lyon and Hungary . Florentine bankers financed
3993-600: The Milky Way , previously believed to be nebulous , and found it to be a multitude of stars packed so densely that they appeared from Earth to be clouds. He located many other stars too distant to be visible to the naked eye. He observed the double star Mizar in Ursa Major in 1617. In the Starry Messenger , Galileo reported that stars appeared as mere blazes of light, essentially unaltered in appearance by
4114-574: The Roman Inquisition by Father Niccolò Lorini , who claimed that Galileo and his followers were attempting to reinterpret the Bible, which was seen as a violation of the Council of Trent and looked dangerously like Protestantism . Lorini specifically cited Galileo's letter to Castelli. Galileo went to Rome to defend himself and his ideas. At the start of 1616, Francesco Ingoli initiated
4235-563: The Sun would cause its illuminated hemisphere to face the Earth when it was on the opposite side of the Sun and to face away from the Earth when it was on the Earth-side of the Sun. In Ptolemy's geocentric model , it was impossible for any of the planets' orbits to intersect the spherical shell carrying the Sun. Traditionally, the orbit of Venus was placed entirely on the near side of the Sun, where it could exhibit only crescent and new phases. It
4356-710: The Tuscan Committee of National Liberation (CTLN). The Allied soldiers who died driving the Germans from Tuscany are buried in cemeteries outside the city (Americans about nine kilometres or 5 + 1 ⁄ 2 miles south of the city, British and Commonwealth soldiers a few kilometres east of the centre on the right bank of the Arno). At the end of World War II in May 1945, the US Army's Information and Educational Branch
4477-524: The Tychonic , Capellan and Extended Capellan models, each either with or without a daily rotating Earth. These all explained the phases of Venus without the 'refutation' of full heliocentrism's prediction of stellar parallax. Galileo's discovery of the phases of Venus was thus his most empirically practically influential contribution to the two-stage transition from full geocentrism to full heliocentrism via geo-heliocentrism. In 1610, Galileo also observed
4598-545: The Uffizi Gallery and the Palazzo Pitti , and still exerts an influence in the fields of art, culture and politics. Due to Florence's artistic and architectural heritage, Forbes ranked it as one of the most beautiful cities in the world in 2010. Florence plays an important role in Italian fashion , and is ranked in the top 15 fashion capitals of the world by Global Language Monitor ; furthermore, it
4719-535: The thermometer , and, in 1586, published a small book on the design of a hydrostatic balance he had invented (which first brought him to the attention of the scholarly world). Galileo also studied disegno , a term encompassing fine art, and, in 1588, obtained the position of instructor in the Accademia delle Arti del Disegno in Florence, teaching perspective and chiaroscuro . In the same year, upon invitation by
4840-444: The urban area of Florence. The Metropolitan Area of Florence, Prato and Pistoia , constituted in 2000 over an area of roughly 4,800 square kilometres (1,850 sq mi), is home to 1.5 million people. Within Florence proper, 46.8% of the population was male in 2007 and 53.2% were female. Minors (children aged 18 and less) totalled 14.10% of the population compared to pensioners, who numbered 25.95 percent. This compares with
4961-742: The 'Third Italy' in the 1990s, due to the exports of high-quality goods and automobile (especially the Vespa ) and the prosperity and productivity of the Florentine entrepreneurs. Some of these industries even rivalled the traditional industrial districts in Emilia-Romagna and Veneto due to high profits and productivity. In the fourth quarter of 2015, manufacturing increased by 2.4% and exports increased by 7.2%. Leading sectors included mechanical engineering, fashion, pharmaceutics, food and wine. During 2015, permanent employment contracts increased by 48.8 percent, boosted by nationwide tax break. Tourism
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5082-481: The 6th century and Florence was in turn conquered by Charlemagne in 774 becoming part of the March of Tuscany centred on Lucca . The population began to grow again and commerce prospered. Margrave Hugo chose Florence as his residency instead of Lucca around 1000 AD. The Golden Age of Florentine art began around this time. In 1100, Florence was a " commune ", meaning a city-state. The city's primary resource
5203-548: The Aristotelian belief in the immutability of the heavens. Perhaps based only on descriptions of the first practical telescope which Hans Lippershey tried to patent in the Netherlands in 1608, Galileo, in the following year, made a telescope with about 3x magnification. He later made improved versions with up to about 30x magnification. With a Galilean telescope , the observer could see magnified, upright images on
5324-477: The Catholic Church, (Leo X and Clement VII, respectively). Both were generous patrons of the arts, commissioning works like Michelangelo 's Laurentian Library and Medici Chapel in Florence, to name just two. Their reigns coincided with political upheaval in Italy, and thus in 1527, Florentines drove out the Medici for a second time and re-established a theocratic republic on 16 May 1527, (Jesus Christ
5445-598: The Church, the majority of educated people subscribed to the Aristotelian geocentric view that the Earth is the centre of the Universe and the orbit of all heavenly bodies, or Tycho Brahe's new system blending geocentrism with heliocentrism. Opposition to heliocentrism and Galileo's writings on it combined religious and scientific objections. Religious opposition to heliocentrism arose from biblical passages implying
5566-669: The Earth—it was what is commonly known as a terrestrial telescope or a spyglass. He could also use it to observe the sky; for a time he was one of those who could construct telescopes good enough for that purpose. On 25 August 1609, he demonstrated one of his early telescopes, with a magnification of about 8x or 9x, to Venetian lawmakers. His telescopes were also a profitable sideline for Galileo, who sold them to merchants who found them useful both at sea and as items of trade. He published his initial telescopic astronomical observations in March 1610 in
5687-539: The English kings during the Hundred Years' War . They similarly financed the papacy, including the construction of their provisional capital of Avignon and, after their return to Rome, the reconstruction and Renaissance embellishment of Rome. Florence was home to the Medici, one of European history's most important noble families. Lorenzo de' Medici was considered a political and cultural mastermind of Italy in
5808-655: The Florentine painter Cigoli . In 1589, he was appointed to the chair of mathematics in Pisa. In 1591, his father died, and he was entrusted with the care of his younger brother Michelagnolo . In 1592, he moved to the University of Padua where he taught geometry, mechanics , and astronomy until 1610. During this period, Galileo made significant discoveries in both pure fundamental science (for example, kinematics of motion and astronomy) as well as practical applied science (for example, strength of materials and pioneering
5929-489: The Italian average of 18.06 percent (minors) and 19.94 percent (pensioners). The average age of Florence resident is 49 compared to the Italian average of 42. In the five years between 2002 and 2007, the population of Florence grew by 3.22 percent, while Italy as a whole grew by 3.56 percent. The birth rate of Florence is 7.66 births per 1,000 inhabitants compared to the Italian average of 9.45 births. As of 2009 , 87.46% of
6050-475: The Moon. Grassi's arguments and conclusions were criticised in a subsequent article, Discourse on Comets , published under the name of one of Galileo's disciples, a Florentine lawyer named Mario Guiducci , although it had been largely written by Galileo himself. Galileo and Guiducci offered no definitive theory of their own on the nature of comets, although they did present some tentative conjectures that are now known to be mistaken. (The correct approach to
6171-556: The Pope and the Jesuits , who had both strongly supported Galileo up until this point. He was tried by the Inquisition, found "vehemently suspect of heresy", and forced to recant. He spent the rest of his life under house arrest. During this time, he wrote Two New Sciences (1638), primarily concerning kinematics and the strength of materials . Galileo was born in Pisa (then part of
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#17327878573986292-611: The Sun or even the orbit of the Earth. It would not be until much later that astronomers realized the apparent magnitudes of stars were caused by an optical phenomenon called the airy disk , and were functions of their brightness rather than true physical size (see Magnitude#History ). Galileo defended heliocentrism based on his astronomical observations of 1609 . In December 1613, the Grand Duchess Christina of Florence confronted one of Galileo's friends and followers, Benedetto Castelli , with biblical objections to
6413-511: The Two Chief World Systems the Dialogue on the Ebb and Flow of the Sea . The reference to tides was removed from the title by order of the Inquisition. For Galileo, the tides were caused by the sloshing back and forth of water in the seas as a point on the Earth's surface sped up and slowed down because of the Earth's rotation on its axis and revolution around the Sun. He circulated his first account of
6534-537: The U.S. In 2014, the city had 8.5 million overnight stays. A Euromonitor report indicates that in 2015 the city ranked as the world's 36th most visited in the world, with over 4.95 million arrivals for the year. Tourism brings revenue to Florence, but also creates certain problems. The Ponte Vecchio, The San Lorenzo Market and Santa Maria Novella are plagued by pickpockets. The province of Florence receives roughly 13 million visitors per year and in peak seasons, popular locations may become overcrowded as
6655-634: The book, and to be careful not to advocate heliocentrism. Whether unknowingly or deliberately, Simplicio, the defender of the Aristotelian geocentric view in Dialogue Concerning the Two Chief World Systems , was often caught in his own errors and sometimes came across as a fool. Indeed, although Galileo states in the preface of his book that the character is named after a famous Aristotelian philosopher ( Simplicius in Latin, "Simplicio" in Italian),
6776-419: The centre, damaging many art treasures. Around the city there are tiny placards on the walls noting where the flood waters reached at their highest point. Florence lies in a basin formed by the hills of Careggi , Fiesole , Settignano , Arcetri , Poggio Imperiale and Bellosguardo (Florence). The Arno river , three other minor rivers (Mugnone, Ema and Greve) and some streams flow through it. Florence has
6897-410: The chandelier took the same amount of time to swing back and forth, no matter how far it was swinging. When he returned home, he set up two pendulums of equal length and swung one with a large sweep and the other with a small sweep and found that they kept time together. It was not until the work of Christiaan Huygens , almost one hundred years later, that the tautochrone nature of a swinging pendulum
7018-429: The city as their third favourite tourist destination. In 2015, Condé Nast Travel readers voted Florence as the best city in Europe. Studies by Euromonitor International have concluded that cultural and history-oriented tourism is generating significantly increased spending throughout Europe. Florence is believed to have the greatest concentration of art (in proportion to its size) in the world. Thus, cultural tourism
7139-406: The condemned opinions, and initially he denied even defending them. However, he was eventually persuaded to admit that, contrary to his true intention, a reader of his Dialogue could well have obtained the impression that it was intended to be a defence of Copernicanism. In view of Galileo's rather implausible denial that he had ever held Copernican ideas after 1616 or ever intended to defend them in
7260-518: The death of Gian Gastone de' Medici in 1737. The Kingdom of Italy , which was established in 1861, moved its capital from Turin to Florence in 1865, although the capital was moved to Rome in 1871. Florence was established by the Romans in 59 BC as a colony for veteran soldiers and was built in the style of an army camp . Situated along the Via Cassia , the main route between Rome and
7381-519: The eclipse of Florence's formerly powerful rival Pisa . The growing power of the merchant elite culminated in an anti-aristocratic uprising, led by Giano della Bella , resulting in the Ordinances of Justice which entrenched the power of the elite guilds until the end of the Republic. At the height of demographic expansion around 1325, the urban population may have been as great as 120,000, and
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#17327878573987502-485: The existence of the moons. Christopher Clavius 's observatory in Rome confirmed the observations and, although unsure how to interpret them, gave Galileo a hero's welcome when he visited the next year. Galileo continued to observe the satellites over the next eighteen months, and by mid-1611, he had obtained remarkably accurate estimates for their periods—a feat which Johannes Kepler had believed impossible. Galileo saw
7623-461: The fixed nature of the Earth. Scientific opposition came from Brahe, who argued that if heliocentrism were true, an annual stellar parallax should be observed, though none was at the time. Aristarchus and Copernicus had correctly postulated that parallax was negligible because the stars were so distant. However, Brahe countered that since stars appear to have measurable angular size , if the stars were that distant, they would have to be far larger than
7744-485: The fourth on 13 January. Galileo named the group of four the Medicean stars , in honour of his future patron, Cosimo II de' Medici, Grand Duke of Tuscany , and Cosimo's three brothers. Later astronomers, however, renamed them Galilean satellites in honour of their discoverer. These satellites were independently discovered by Simon Marius on 8 January 1610 and are now called Io , Europa , Ganymede , and Callisto ,
7865-453: The heights of the mountains. The Moon was not what was long thought to have been a translucent and perfect sphere, as Aristotle claimed, and hardly the first "planet", an "eternal pearl to magnificently ascend into the heavenly empyrian", as put forth by Dante . Galileo is sometimes credited with the discovery of the lunar libration in latitude in 1632, although Thomas Harriot or William Gilbert may have done so before. The painter Cigoli,
7986-488: The late 15th century. Two members of the family were popes in the early 16th century: Leo X and Clement VII . Catherine de' Medici married King Henry II of France and, after his death in 1559, reigned as regent in France. Marie de' Medici married Henry IV of France and gave birth to the future King Louis XIII . The Medici reigned as Grand Dukes of Tuscany , starting with Cosimo I de' Medici in 1569 and ending with
8107-530: The legal heir of Galileo and married Sestilia Bocchineri. Although Galileo seriously considered the priesthood as a young man, at his father's urging he instead enrolled in 1580 at the University of Pisa for a medical degree. He was influenced by the lectures of Girolamo Borro and Francesco Buonamici of Florence. In 1581, when he was studying medicine, he noticed a swinging chandelier , which air currents shifted about to swing in larger and smaller arcs. To him, it seemed, by comparison with his heartbeat, that
8228-468: The lowest was −23.2 °C (−9.8 °F) on 12 January 1985. In 1200 the city was home to 50,000 people. By 1300 the population of the city proper was 120,000, with an additional 300,000 living in the Contado . Between 1500 and 1650 the population was around 70,000. As of 31 October 2010 , the population of the city proper is 370,702, while Eurostat estimates that 696,767 people live in
8349-495: The motion of the Earth. Prompted by this incident, Galileo wrote a letter to Castelli in which he argued that heliocentrism was actually not contrary to biblical texts and that the Bible was an authority on faith and morals, not science. This letter was not published but circulated widely. Two years later, Galileo wrote a letter to Christina that expanded his arguments previously made in eight pages to forty pages. By 1615, Galileo's writings on heliocentrism had been submitted to
8470-401: The name "Simplicio" in Italian also has the connotation of "simpleton". This portrayal of Simplicio made Dialogue Concerning the Two Chief World Systems appear as an advocacy book: an attack on Aristotelian geocentrism and defence of the Copernican theory. Most historians agree Galileo did not act out of malice and felt blindsided by the reaction to his book. However, the Pope did not take
8591-432: The names given by Marius in his Mundus Iovialis published in 1614. Galileo's observations of the satellites of Jupiter caused controversy in astronomy: a planet with smaller planets orbiting it did not conform to the principles of Aristotelian cosmology , which held that all heavenly bodies should circle the Earth, and many astronomers and philosophers initially refused to believe that Galileo could have discovered such
8712-529: The north, and within the fertile valley of the Arno , the settlement quickly became an important commercial centre and in AD 285 became the capital of the Tuscia region. In centuries to come, the city experienced turbulent alternate periods of Ostrogoth and Byzantine rule, during which the city was fought over, helping to cause the population to fall to as low as 1,000 people. Peace returned under Lombard rule in
8833-426: The number of visitors had increased by 5.5% from the previous year. In 2013, Florence was listed as the second best world city by Condé Nast Traveler . Manufacturing and commerce remain highly important. Florence is Italy's 17th richest city in terms of average workers' earnings, with the figure being €23,265 (the overall city's income is €6,531,204,473), coming after Mantua , yet surpassing Bolzano . Florence
8954-535: The opinion that the sun stands still at the centre of the world and the Earth moves, and henceforth not to hold, teach, or defend it in any way whatever, either orally or in writing." The decree of the Congregation of the Index banned Copernicus's De Revolutionibus and other heliocentric works until correction. For the next decade, Galileo stayed well away from the controversy. He revived his project of writing
9075-540: The painting, Stillman Drake wrote "there is no doubt now that the famous words were already attributed to Galileo before his death". However, an intensive investigation by astrophysicist Mario Livio has revealed that said painting is most probably a copy of an 1837 painting by the Flemish painter Roman-Eugene Van Maldeghem. After a period with the friendly Ascanio Piccolomini (the Archbishop of Siena ), Galileo
9196-473: The planet Saturn , and at first mistook its rings for planets, thinking it was a three-bodied system. When he observed the planet later, Saturn's rings were directly oriented to Earth, causing him to think that two of the bodies had disappeared. The rings reappeared when he observed the planet in 1616, further confusing him. Galileo observed the planet Neptune in 1612. It appears in his notebooks as one of many unremarkable dim stars. He did not realise that it
9317-508: The population belonging to the Archdiocese of Florence . As of 2016, an estimated 30,000 people, or 8% of the population, identified as Muslim. Foreign-born population (31.12.2019) Tourism is, by far, the most important of all industries and most of the Florentine economy relies on the money generated by international arrivals and students studying in the city. The value tourism to the city totalled some €2.5 billion in 2015 and
9438-462: The population was Italian. An estimated 6,000 Chinese live in the city. The largest immigrant group came from other European countries (mostly Romanians and Albanians ): 3.52%, East Asia (mostly Chinese and Filipino ): 2.17%, the Americas: 1.41%, and North Africa (mostly Moroccan ): 0.9%. Much like the rest of Italy most of the people in Florence are Roman Catholic , with more than 90% of
9559-421: The positions of these "stars" relative to Jupiter were changing in a way that would have been inexplicable if they had really been fixed stars . On 10 January, Galileo noted that one of them had disappeared, an observation which he attributed to its being hidden behind Jupiter. Within a few days, he concluded that they were orbiting Jupiter: he had discovered three of Jupiter's four largest moons . He discovered
9680-409: The present name) was significantly widened and a large triumphal arch was constructed at the west end. A museum recording the destruction stands nearby today. The country's second capital city was superseded by Rome six years later, after the withdrawal of the French troops allowed the capture of Rome . During World War II the city experienced a year-long German occupation (1943–1944) being part of
9801-498: The prestige of the masterpieces by Dante Alighieri , Petrarch , Giovanni Boccaccio , Niccolò Machiavelli and Francesco Guicciardini . The city attracts millions of tourists each year, and UNESCO declared the Historic Centre of Florence a World Heritage Site in 1982. The city is noted for its culture, Renaissance art and architecture and monuments. The city also contains numerous museums and art galleries, such as
9922-466: The previous decade, Barberini, the future Urban VIII, had come down on the side of Galileo and the Lincean Academy . Galileo's dispute with Grassi permanently alienated many Jesuits, and Galileo and his friends were convinced that they were responsible for bringing about his later condemnation, although supporting evidence for this is not conclusive. At the time of Galileo's conflict with
10043-478: The prizes. Observing the moons from a ship proved too difficult, but the method was used for land surveys, including the remapping of France. From September 1610, Galileo observed that Venus exhibits a full set of phases similar to that of the Moon . The heliocentric model of the Solar System developed by Nicolaus Copernicus predicted that all phases would be visible since the orbit of Venus around
10164-472: The properties of the pendulum and " hydrostatic balances". He was one of the earliest Renaissance developers of the thermoscope and the inventor of various military compasses . With an improved telescope he built, he observed the stars of the Milky Way , the phases of Venus , the four largest satellites of Jupiter , Saturn's rings , lunar craters and sunspots . He also built an early microscope . Galileo's championing of Copernican heliocentrism
10285-502: The pseudonym Lothario Sarsio Sigensano, purporting to be one of his own pupils. The Assayer was Galileo's devastating reply to the Astronomical Balance . It has been widely recognized as a masterpiece of polemical literature, in which "Sarsi's" arguments are subjected to withering scorn. It was greeted with wide acclaim, and particularly pleased the new pope, Urban VIII , to whom it had been dedicated. In Rome, in
10406-488: The rebellious phrase " And yet it moves ". There was a claim that a 1640s painting by the Spanish painter Bartolomé Esteban Murillo or an artist of his school, in which the words were hidden until restoration work in 1911, depicts an imprisoned Galileo apparently gazing at the words "E pur si muove" written on the wall of his dungeon. The earliest known written account of the legend dates to a century after his death. Based on
10527-415: The result of several secondary causes including the shape of the sea, its depth, and other factors. Albert Einstein later expressed the opinion that Galileo developed his "fascinating arguments" and accepted them uncritically out of a desire for physical proof of the motion of the Earth. Galileo also dismissed the idea, known from antiquity and by his contemporary Johannes Kepler, that the Moon caused
10648-522: The rural population around the city was probably close to 300,000. The Black Death of 1348 reduced it by over half, about 25,000 are said to have been supported by the city's wool industry: in 1345 Florence was the scene of an attempted strike by wool combers ( ciompi ), who in 1378 rose up in a brief revolt against oligarchic rule in the Revolt of the Ciompi . After their suppression, Florence came under
10769-443: The sense of Holy Scripture". The Inquisition found that the idea of the Earth's movement "receives the same judgement in philosophy and ... in regard to theological truth, it is at least erroneous in faith". Pope Paul V instructed Cardinal Bellarmine to deliver this finding to Galileo, and to order him to abandon heliocentrism. On 26 February, Galileo was called to Bellarmine's residence and ordered "to abandon completely ...
10890-643: The size of the French army at the gates of Pisa, he had to accept the humiliating conditions of the French king. These made the Florentines rebel, and they expelled Piero II. With his exile in 1494, the first period of Medici rule ended with the restoration of a republican government. During this period, the Dominican friar Girolamo Savonarola had become prior of the San Marco monastery in 1490. He
11011-502: The smaller sizes were not small enough to answer Tycho's argument. Cardinal Bellarmine had written in 1615 that the Copernican system could not be defended without "a true physical demonstration that the sun does not circle the earth but the earth circles the sun". Galileo considered his theory of the tides to provide such evidence. This theory was so important to him that he originally intended to call his Dialogue Concerning
11132-436: The star at his viewing point. In his Dialogue , he reported that he had found the apparent diameter of a star of first magnitude to be no more than 5 arcseconds , and that of one of sixth magnitude to be about / 6 arcseconds. Like most astronomers of his day, Galileo did not recognise that the apparent sizes of stars that he measured were spurious, caused by diffraction and atmospheric distortion, and did not represent
11253-422: The stars as they appeared to be much larger than the Sun. The essay also included four theological arguments, but Ingoli suggested Galileo focus on the physical and mathematical arguments, and he did not mention Galileo's biblical ideas. In February 1616, an Inquisitorial commission declared heliocentrism to be "foolish and absurd in philosophy, and formally heretical since it explicitly contradicts in many places
11374-588: The study of comets had been proposed at the time by Tycho Brahe.) In its opening passage, Galileo and Guiducci's Discourse gratuitously insulted the Jesuit Christoph Scheiner , and various uncomplimentary remarks about the professors of the Collegio Romano were scattered throughout the work. The Jesuits were offended, and Grassi soon replied with a polemical tract of his own, The Astronomical and Philosophical Balance , under
11495-588: The surname "Galilei") derives from the Latin "Galilaeus", meaning "of Galilee ". The biblical roots of Galileo's name and surname were to become the subject of a famous pun. In 1614, during the Galileo affair , one of Galileo's opponents, the Dominican priest Tommaso Caccini , delivered against Galileo a controversial and influential sermon . In it he made a point of quoting Acts 1:11 : "Ye men of Galilee, why stand ye gazing up into heaven?". Despite being
11616-560: The suspected public ridicule lightly, nor the Copernican advocacy. Galileo had alienated one of his biggest and most powerful supporters, the Pope, and was called to Rome to defend his writings in September 1632. He finally arrived in February 1633 and was brought before inquisitor Vincenzo Maculani to be charged . Throughout his trial, Galileo steadfastly maintained that since 1616 he had faithfully kept his promise not to hold any of
11737-481: The sway (1382–1434) of the Albizzi family, who became bitter rivals of the Medici. In the 15th century, Florence was among the largest cities in Europe, with a population of 60,000, and was considered rich and economically successful. Cosimo de' Medici was the first Medici family member to essentially control the city from behind the scenes. Although the city was technically a democracy of sorts, his power came from
11858-573: The telescope). His multiple interests included the study of astrology , which at the time was a discipline tied to the studies of mathematics, astronomy and medicine. Tycho Brahe and others had observed the supernova of 1572 . Ottavio Brenzoni's letter of 15 January 1605 to Galileo brought the 1572 supernova and the less bright nova of 1601 to Galileo's notice. Galileo observed and discussed Kepler's Supernova in 1604. Since these new stars displayed no detectable diurnal parallax , Galileo concluded that they were distant stars, and, therefore, disproved
11979-440: The telescope, and contrasted them to planets, which the telescope revealed to be discs. But shortly thereafter, in his Letters on Sunspots , he reported that the telescope revealed the shapes of both stars and planets to be "quite round". From that point forward, he continued to report that telescopes showed the roundness of stars, and that stars seen through the telescope measured a few seconds of arc in diameter. He also devised
12100-693: The tides in 1616, addressed to Cardinal Orsini . His theory gave the first insight into the importance of the shapes of ocean basins in the size and timing of tides; he correctly accounted, for instance, for the negligible tides halfway along the Adriatic Sea compared to those at the ends. As a general account of the cause of tides, however, his theory was a failure. If this theory were correct, there would be only one high tide per day. Galileo and his contemporaries were aware of this inadequacy because there are two daily high tides at Venice instead of one, about 12 hours apart. Galileo dismissed this anomaly as
12221-528: The tides—Galileo also took no interest in Kepler's elliptical orbits of the planets . Galileo continued to argue in favour of his theory of tides, considering it the ultimate proof of Earth's motion. In 1619, Galileo became embroiled in a controversy with Father Orazio Grassi , professor of mathematics at the Jesuit Collegio Romano . It began as a dispute over the nature of comets, but by
12342-573: The time Galileo had published The Assayer ( Il Saggiatore ) in 1623, his last salvo in the dispute, it had become a much wider controversy over the very nature of science itself. The title page of the book describes Galileo as a philosopher and "Matematico Primario" of the Grand Duke of Tuscany. Because The Assayer contains such a wealth of Galileo's ideas on how science should be practised, it has been referred to as his scientific manifesto. Early in 1619, Father Grassi had anonymously published
12463-483: The time, surnames were optional in Italy, and his first name had the same origin as his sometimes-family name, Galilei. Both his given and family name ultimately derived from an ancestor, Galileo Bonaiuti , an important physician, professor, and politician in Florence in the 15th century. Galileo Bonaiuti was buried in the same church, the Basilica of Santa Croce in Florence , where about 200 years later, Galileo Galilei
12584-520: The true sizes of stars. However, Galileo's values were much smaller than previous estimates of the apparent sizes of the brightest stars, such as those made by Brahe, and enabled Galileo to counter anti-Copernican arguments such as those made by Tycho that these stars would have to be absurdly large for their annual parallaxes to be undetectable. Other astronomers such as Simon Marius, Giovanni Battista Riccioli , and Martinus Hortensius made similar measurements of stars, and Marius and Riccioli concluded
12705-508: Was a Florentine astronomer , physicist and engineer, sometimes described as a polymath . He was born in the city of Pisa , then part of the Duchy of Florence . Galileo has been called the father of observational astronomy , modern-era classical physics, the scientific method , and modern science . Galileo studied speed and velocity , gravity and free fall , the principle of relativity , inertia , projectile motion and also worked in applied science and technology, describing
12826-419: Was a planet, but he did note its motion relative to the stars before losing track of it. Galileo made naked-eye and telescopic studies of sunspots . Their existence raised another difficulty with the unchanging perfection of the heavens as posited in orthodox Aristotelian celestial physics. An apparent annual variation in their trajectories, observed by Francesco Sizzi and others in 1612–1613, also provided
12947-571: Was allowed to return to his villa at Arcetri near Florence in 1634, where he spent part of his life under house arrest. Galileo was ordered to read the Seven Penitential Psalms once a week for the next three years. However, his daughter Maria Celeste relieved him of the burden after securing ecclesiastical permission to take it upon herself. Florence, Italy Florence ( / ˈ f l ɒr ən s / FLORR -ənss ; Italian : Firenze [fiˈrɛntse] )
13068-542: Was also buried. When he did refer to himself with more than one name, it was sometimes as Galileo Galilei Linceo, a reference to his being a member of the Accademia dei Lincei , an elite science organization founded in the Papal States . It was common for mid-16th century Tuscan families to name the eldest son after the parents' surname. Hence, Galileo Galilei was not necessarily named after his ancestor Galileo Bonaiuti. The Italian male given name "Galileo" (and thence
13189-416: Was also possible to place it entirely on the far side of the Sun, where it could exhibit only gibbous and full phases. After Galileo's telescopic observations of the crescent, gibbous and full phases of Venus, the Ptolemaic model became untenable. In the early 17th century, as a result of his discovery, the great majority of astronomers converted to one of the various geo-heliocentric planetary models, such as
13310-547: Was an accomplished poet and musician and brought composers and singers to Florence, including Alexander Agricola , Johannes Ghiselin , and Heinrich Isaac . By contemporary Florentines (and since), he was known as "Lorenzo the Magnificent" (Lorenzo il Magnifico). Following Lorenzo de' Medici's death in 1492, he was succeeded by his son Piero II . When the French king Charles VIII invaded northern Italy , Piero II chose to resist his army. But when he realised
13431-485: Was eight, his family moved to Florence , but he was left under the care of Muzio Tedaldi for two years. When Galileo was ten, he left Pisa to join his family in Florence, where he came under the tutelage of Jacopo Borghini. He was educated, particularly in logic, from 1575 to 1578 in the Vallombrosa Abbey , about 30 km southeast of Florence. Galileo tended to refer to himself only by his first name. At
13552-502: Was excommunicated. The Florentines, tired of his teachings, turned against him and arrested him. He was convicted as a heretic, hanged and burned on the Piazza della Signoria on 23 May 1498. His ashes were dispersed in the Arno river. Another Florentine of this period was Niccolò Machiavelli , whose prescriptions for Florence's regeneration under strong leadership have often been seen as
13673-449: Was famed for his penitential sermons, lambasting what he viewed as widespread immorality and attachment to material riches. He praised the exile of the Medici as the work of God, punishing them for their decadence. He seized the opportunity to carry through political reforms leading to a more democratic rule. But when Savonarola publicly accused Pope Alexander VI of corruption, he was banned from speaking in public. When he broke this ban, he
13794-542: Was met with opposition from within the Catholic Church and from some astronomers. The matter was investigated by the Roman Inquisition in 1615, which concluded that his opinions contradicted accepted Biblical interpretations. Galileo later defended his views in Dialogue Concerning the Two Chief World Systems (1632), which appeared to attack and ridicule Pope Urban VIII , thus alienating both
13915-525: Was named Grand Duke of Tuscany in 1569; in all Tuscany, only the Republic of Lucca (later a Duchy ) and the Principality of Piombino were independent from Florence. The extinction of the Medici dynasty and the accession in 1737 of Francis Stephen , duke of Lorraine and husband of Maria Theresa of Austria , led to Tuscany's temporary inclusion in the territories of the Austrian crown. It became
14036-518: Was named King of Florence). The Medici returned to power in Florence in 1530, with the armies of Holy Roman Emperor Charles V and the blessings of Pope Clement VII (Giulio de' Medici). Florence officially became a monarchy in 1531, when Emperor Charles and Pope Clement named Alessandro de' Medici as Duke of the Florentine Republic . The Medici's monarchy would last over two centuries. Alessandro's successor, Cosimo I de' Medici ,
14157-514: Was ordered to establish an overseas university campus for demobilised American service men and women in Florence. The first American university for service personnel was established in June 1945 at the School of Aeronautics. Some 7,500 soldier-students were to pass through the university during its four one-month sessions (see G. I. American Universities ). In November 1966, the Arno flooded parts of
14278-603: Was restored on the throne of Tuscany at the Congress of Vienna but finally deposed in 1859. Tuscany became a region of the Kingdom of Italy in 1861. Florence replaced Turin as Italy's capital in 1865 and, in an effort to modernise the city, the old market in the Piazza del Mercato Vecchio and many medieval houses were pulled down and replaced by a more formal street plan with newer houses. The Piazza (first renamed Piazza Vittorio Emanuele II , then Piazza della Repubblica ,
14399-492: Was the Arno river , providing power and access for the industry (mainly textile industry), and access to the Mediterranean sea for international trade, helping the growth of an industrious merchant community. The Florentine merchant banking skills became recognised in Europe after they brought decisive financial innovation (e.g. bills of exchange , double-entry bookkeeping system ) to medieval fairs. This period also saw
14520-465: Was the religious life. Both girls were accepted by the convent of San Matteo in Arcetri and remained there for the rest of their lives. Virginia took the name Maria Celeste upon entering the convent. She died on 2 April 1634, and is buried with Galileo at the Basilica of Santa Croce, Florence . Livia took the name Sister Arcangela and was ill for most of her life. Vincenzo was later legitimised as
14641-399: Was used to create an accurate timepiece. Up to this point, Galileo had deliberately been kept away from mathematics, since a physician earned a higher income than a mathematician. However, after accidentally attending a lecture on geometry, he talked his reluctant father into letting him study mathematics and natural philosophy instead of medicine. He created a thermoscope , a forerunner of
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