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82-528: Plaster City, California is a company town with a large gypsum quarry and plant owned by United States Gypsum (USG) in Imperial County, California . It is located 17 miles (27 km) west of El Centro , at an elevation of 105 feet (32 m), a two-hour drive south of Palm Springs , or a 90 minute drive east from San Diego . The quarry and supporting railroad were started in 1920 by Imperial Valley Gypsum and Oil Corporation founder Samuel Dunnaway,

164-770: A Proto-Celtic form reconstructed as * kwar-is-io -. Alternatively, Pierre-Yves Lambert proposed to translate Parisii as the 'spear people', by connecting the first element to the Old Irish carr ('spear'), derived from an earlier * kwar-sā . In any case, the city's name is not related to the Paris of Greek mythology . Residents of the city are known in English as Parisians and in French as Parisiens ( [paʁizjɛ̃] ). They are also pejoratively called Parigots ( [paʁiɡo] ). The Parisii ,

246-556: A hydration product of anhydrite . The Mohs scale of mineral hardness defines gypsum as hardness value 2 based on scratch hardness comparison . Fine-grained white or lightly tinted forms of gypsum known as alabaster have been used for sculpture by many cultures including Ancient Egypt , Mesopotamia , Ancient Rome , the Byzantine Empire , and the Nottingham alabasters of Medieval England . The word gypsum

328-529: A recommended exposure limit (REL) of TWA 10 mg/m for total exposure and TWA 5 mg/m for respiratory exposure over an eight-hour workday. Gypsum is used in a wide variety of applications: Paris Paris ( French pronunciation: [paʁi] ) is the capital and largest city of France . With an estimated population of 2,102,650 residents in January 2023 in an area of more than 105 km (41 sq mi), Paris

410-530: A fair amount of sunshine. Each year there are a few days when the temperature rises above 32 °C (90 °F). Longer periods of more intense heat sometimes occur, such as the heat wave of 2003 when temperatures exceeded 30 °C (86 °F) for weeks, reached 40 °C (104 °F) on some days, and rarely cooled down at night. Spring and autumn have, on average, mild days and cool nights, but are changing and unstable. Surprisingly warm or cool weather occurs frequently in both seasons. In winter, sunshine

492-720: A huge and emotional crowd down the Champs Élysées towards Notre Dame de Paris and made a rousing speech from the Hôtel de Ville . In the 1950s and the 1960s, Paris became one front of the Algerian War for independence; in August 1961, the pro-independence FLN targeted and killed 11 Paris policemen, leading to the imposition of a curfew on Muslims of Algeria (who, at that time, were French citizens). On 17 October 1961, an unauthorised but peaceful protest demonstration of Algerians against

574-514: A pharmacist from San Diego, then acquired by United States Gypsum in 1945. Plaster City is the southern terminus of the last industrial narrow gauge railroad in the United States. The 3 ft ( 914 mm ) gauge line runs from another quarry about 22 miles (35 km) miles to the northwest, bringing gypsum to the plant. Plaster City is served by the former San Diego and Arizona Eastern Railway , owned by Union Pacific Railroad to

656-474: A range of industrial processes. Flue gas desulfurization gypsum (FGDG) is recovered at some coal-fired power plants. The main contaminants are Mg, K, Cl, F, B, Al, Fe, Si, and Se. They come both from the limestone used in desulfurization and from the coal burned. This product is pure enough to replace natural gypsum in a wide variety of fields including drywalls, water treatment, and cement set retarder. Improvements in flue gas desulfurization have greatly reduced

738-413: A result, waste gypsum is stored in stacks indefinitely, with significant risk of leaching their contaminants into water and soil. To reduce the accumulation and ultimately clear out these stacks, research is underway to find more applications for such waste products. People can be exposed to gypsum in the workplace by breathing it in, skin contact, and eye contact. Calcium sulfate per se is nontoxic and

820-478: A source of sulfur for plant growth, and in the early 19th century, it was regarded as an almost miraculous fertilizer. American farmers were so anxious to acquire it that a lively smuggling trade with Nova Scotia evolved, resulting in the so-called "Plaster War" of 1820. Gypsum is moderately water-soluble (~2.0–2.5 g/L at 25 °C) and, in contrast to most other salts, it exhibits retrograde solubility, becoming less soluble at higher temperatures. When gypsum

902-784: A sub-tribe of the Celtic Senones , inhabited the Paris area from around the middle of the 3rd century BC. One of the area's major north–south trade routes crossed the Seine on the Île de la Cité , which gradually became an important trading centre. The Parisii traded with many river towns (some as far away as the Iberian Peninsula) and minted their own coins. The Romans conquered the Paris Basin in 52 BC and began their settlement on Paris's Left Bank . The Roman town

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984-543: A wide range of colors to local deposits. Because gypsum dissolves over time in water, gypsum is rarely found in the form of sand. However, the unique conditions of the White Sands National Park in the US state of New Mexico have created a 710 km (270 sq mi) expanse of white gypsum sand, enough to supply the US construction industry with drywall for 1,000 years. Commercial exploitation of

1066-527: Is Montmartre at 130 m (427 ft). Excluding the outlying parks of Bois de Boulogne and Bois de Vincennes , Paris covers an oval measuring about 87 km (34 sq mi) in area, enclosed by the 35 km (22 mi) ring road, the Boulevard Périphérique . Paris' last major annexation of outlying territories in 1860 gave it its modern form, and created the 20 clockwise-spiralling arrondissements (municipal boroughs). From

1148-771: Is 450 km (280 mi) southeast of London, 287 km (178 mi) south of Calais , 305 km (190 mi) southwest of Brussels , 774 km (481 mi) north of Marseille , 385 km (239 mi) northeast of Nantes , and 135 km (84 mi) southeast of Rouen . Paris has an oceanic climate within the Köppen climate classification , typical of western Europe. This climate type features cool winters, with frequent rain and overcast skies, and mild to warm summers. Very hot and very cold temperatures and weather extremes are rare in this type of climate. Summer days are usually mild and pleasant, with average temperatures between 15 and 25 °C (59 and 77 °F), and

1230-478: Is a stub . You can help Misplaced Pages by expanding it . Gypsum Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate , with the chemical formula CaSO 4 ·2H 2 O . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster , drywall and blackboard or sidewalk chalk . Gypsum also crystallizes as translucent crystals of selenite . It forms as an evaporite mineral and as

1312-510: Is contaminated by impurities found in the rock, namely fluoride , silica , radioactive elements such as radium , and heavy metal elements such as cadmium . Similarly, production of titanium dioxide produces titanium gypsum (TG) due to neutralization of excess acid with lime . The product is contaminated with silica, fluorides, organic matters, and alkalis. Impurities in refinery gypsum waste have, in many cases, prevented them from being used as normal gypsum in fields such as construction. As

1394-746: Is derived from its early inhabitants, the Parisii , a Gallic tribe from the Iron Age and the Roman period . The meaning of the Gaulish ethnonym remains debated. According to Xavier Delamarre , it may derive from the Celtic root pario- ('cauldron'). Alfred Holder interpreted the name as 'the makers' or 'the commanders', by comparing it to the Welsh peryff ('lord, commander'), both possibly descending from

1476-588: Is derived from the Greek word γύψος ( gypsos ), "plaster". Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum ( calcined gypsum) used for various purposes, this dehydrated gypsum became known as plaster of Paris . Upon adding water, after a few dozen minutes, plaster of Paris becomes regular gypsum (dihydrate) again, causing the material to harden or "set" in ways that are useful for casting and construction. Gypsum

1558-448: Is even approved as a food additive, but as powdered gypsum, it can irritate skin and mucous membranes. The Occupational Safety and Health Administration (OSHA) has set the legal limit ( permissible exposure limit ) for gypsum exposure in the workplace as TWA 15 mg/m for total exposure and TWA 5 mg/m for respiratory exposure over an eight-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has set

1640-593: Is heated in air it loses water and converts first to calcium sulfate hemihydrate ( bassanite , often simply called "plaster") and, if heated further, to anhydrous calcium sulfate ( anhydrite ). As with anhydrite , the solubility of gypsum in saline solutions and in brines is also strongly dependent on sodium chloride (common table salt) concentration. The structure of gypsum consists of layers of calcium (Ca ) and sulfate ( SO 2− 4 ) ions tightly bound together. These layers are bonded by sheets of anion water molecules via weaker hydrogen bonding , which gives

1722-462: Is prized for ornamental work of various sorts. In arid areas, gypsum can occur in a flower-like form, typically opaque, with embedded sand grains called desert rose . It also forms some of the largest crystals found in nature, up to 12 m (39 ft) long, in the form of selenite. Gypsum is a common mineral, with thick and extensive evaporite beds in association with sedimentary rocks . Deposits are known to occur in strata from as far back as

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1804-440: Is scarce. Days are cool, and nights are cold but generally above freezing, with low temperatures around 3 °C (37 °F). Light night frosts are quite common, but the temperature seldom dips below −5 °C (23 °F). Paris sometimes sees light snow or flurries with or without accumulation. Paris has an average annual precipitation of 641 mm (25.2 in), and experiences light rainfall distributed evenly throughout

1886-463: Is the fourth-largest city in the European Union and the 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance , diplomacy , commerce , culture , fashion , and gastronomy . Because of its leading role in the arts and sciences and its early adaptation of extensive street lighting, it became known as

1968-630: Is the second-busiest metro system in Europe after the Moscow Metro . Gare du Nord is the 24th-busiest railway station in the world and the busiest outside Japan , with 262   million passengers in 2015. Paris has one of the most sustainable transportation systems and is one of only two cities in the world that received the Sustainable Transport Award twice. Paris is known for its museums and architectural landmarks:

2050-498: The Archaean eon . Gypsum is deposited from lake and sea water, as well as in hot springs , from volcanic vapors, and sulfate solutions in veins . Hydrothermal anhydrite in veins is commonly hydrated to gypsum by groundwater in near-surface exposures. It is often associated with the minerals halite and sulfur . Gypsum is the most common sulfate mineral. Pure gypsum is white, but other substances found as impurities may give

2132-619: The Champs-Élysées extended the city west to Étoile , while the working-class neighbourhood of the Faubourg Saint-Antoine on the eastern side of the city grew increasingly crowded with poor migrant workers from other regions of France. Paris was the centre of an explosion of philosophic and scientific activity, known as the Age of Enlightenment . Diderot and D'Alembert published their Encyclopédie in 1751, before

2214-825: The College of Sorbonne , and a palace for himself, the Palais-Cardinal . After Richelieu's death in 1642, it was renamed the Palais-Royal . Due to the Parisian uprisings during the Fronde civil war, Louis XIV moved his court to a new palace, Versailles , in 1682. Although no longer the capital of France, arts and sciences in the city flourished with the Comédie-Française , the Academy of Painting, and

2296-603: The Economist Intelligence Unit Worldwide Cost of Living Survey, in 2022, Paris was the city with the ninth-highest cost of living in the world. Paris is a major railway, highway, and air-transport hub served by two international airports: Charles de Gaulle Airport , the third-busiest airport in Europe , and Orly Airport . Opened in 1900, the city's subway system, the Paris Métro , serves 5.23   million passengers daily. It

2378-663: The European Space Agency , the European Banking Authority and the European Securities and Markets Authority . The football club Paris Saint-Germain and the rugby union club Stade Français are based in Paris. The 81,000-seat Stade de France , built for the 1998 FIFA World Cup , is located just north of Paris in the neighbouring commune of Saint-Denis . Paris hosts the annual French Open Grand Slam tennis tournament on

2460-738: The French Academy of Sciences . To demonstrate that the city was safe from attack, the king had the city walls demolished and replaced with tree-lined boulevards that would become the Grands Boulevards . Other marks of his reign were the Collège des Quatre-Nations , the Place Vendôme , the Place des Victoires , and Les Invalides . Paris grew in population from about 400,000 in 1640 to 650,000 in 1780. A new boulevard named

2542-665: The Grand Paris project, to integrate Paris more closely with the towns in the region around it. After many modifications, the new area, named the Metropolis of Grand Paris , with a population of 6.7 million, was created on 1 January 2016. In 2011, the City of Paris and the national government approved the plans for the Grand Paris Express , totalling 205 km (127 mi) of automated metro lines to connect Paris,

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2624-515: The Louvre received 8.9   million visitors in 2023, on track for keeping its position as the most-visited art museum in the world. The Musée d'Orsay , Musée Marmottan Monet and Musée de l'Orangerie are noted for their collections of French Impressionist art. The Pompidou Centre , Musée National d'Art Moderne , Musée Rodin and Musée Picasso are noted for their collections of modern and contemporary art . The historical district along

2706-790: The Mars Reconnaissance Orbiter (MRO) have indicated the existence of gypsum dunes in the northern polar region of Mars, which were later confirmed at ground level by the Mars Exploration Rover (MER) Opportunity . Commercial quantities of gypsum are found in the cities of Araripina and Grajaú in Brazil; in Pakistan, Jamaica, Iran (world's second largest producer), Thailand, Spain (the main producer in Europe), Germany, Italy, England, Ireland, Canada and

2788-493: The Montgolfier Brothers launched the first manned flight in a hot air balloon on 21 November 1783. Paris was the financial capital of continental Europe, as well the primary European centre for book publishing, fashion and the manufacture of fine furniture and luxury goods. On 22 October 1797, Paris was also the site of the first parachute jump in history, by Garnerin . In the summer of 1789, Paris became

2870-532: The Paris Commune held power for two months, before being harshly suppressed by the French army during the " Bloody Week " at the end of May 1871. In the late 19th century, Paris hosted two major international expositions: the 1889 Universal Exposition , which featured the new Eiffel Tower, was held to mark the centennial of the French Revolution; and the 1900 Universal Exposition gave Paris

2952-599: The Pont Alexandre III , the Grand Palais , the Petit Palais and the first Paris Métro line. Paris became the laboratory of Naturalism ( Émile Zola ) and Symbolism ( Charles Baudelaire and Paul Verlaine ), and of Impressionism in art ( Courbet , Manet , Monet , Renoir ). By 1901, the population of Paris had grown to about 2,715,000. At the beginning of the century, artists from around

3034-634: The Pont des Arts . During the Restoration , the bridges and squares of Paris were returned to their pre-Revolution names; the July Revolution in 1830 (commemorated by the July Column on the Place de la Bastille ) brought to power a constitutional monarch, Louis Philippe I . The first railway line to Paris opened in 1837, beginning a new period of massive migration from the provinces to

3116-794: The Seine in the city centre has been classified as a UNESCO World Heritage Site since 1991. Paris is home to several United Nations organizations including UNESCO, as well as other international organizations such as the OECD , the OECD Development Centre , the International Bureau of Weights and Measures , the International Energy Agency , the International Federation for Human Rights , along with European bodies such as

3198-614: The Siege of Paris (885–886) , for which the then Count of Paris ( comte de Paris ), Odo of France , was elected king of West Francia . From the Capetian dynasty that began with the 987 election of Hugh Capet , Count of Paris and Duke of the Franks ( duc des Francs ), as king of a unified West Francia, Paris gradually became the largest and most prosperous city in France. By the end of

3280-480: The Île Saint-Louis and the larger Île de la Cité , which form the oldest part of Paris. The river's mouth on the English Channel ( La Manche ) is about 233 mi (375 km) downstream from Paris. Paris is spread widely on both banks of the river. Overall, Paris is relatively flat, and the lowest point is 35 m (115 ft) above sea level . Paris has several prominent hills, the highest of which

3362-521: The 12th century, Paris had become the political, economic, religious, and cultural capital of France. The Palais de la Cité , the royal residence, was located at the western end of the Île de la Cité. In 1163, during the reign of Louis VII , Maurice de Sully , bishop of Paris, undertook the construction of the Notre Dame Cathedral at its eastern extremity. After the marshland between the river Seine and its slower 'dead arm' to its north

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3444-503: The 1860 area of 78 km (30 sq mi), the city limits were expanded marginally to 86.9 km (33.6 sq mi) in the 1920s. In 1929, the Bois de Boulogne and Bois de Vincennes forest parks were annexed to the city, bringing its area to about 105 km (41 sq mi). The metropolitan area is 2,300 km (890 sq mi). Measured from the 'point zero' in front of its Notre-Dame cathedral , Paris by road

3526-467: The City of Light in the 19th century. The City of Paris is the centre of the Île-de-France region , or Paris Region, with an official estimated population of 12,271,794 inhabitants in January 2023, or about 19% of the population of France. The Paris Region had a nominal GDP of €765 billion (US$ 1.064 trillion when adjusted for PPP ) in 2021, the highest in the European Union. According to

3608-731: The Frank , the first king of the Merovingian dynasty , made the city his capital from 508. As the Frankish domination of Gaul began, there was a gradual immigration by the Franks to Paris and the Parisian Francien dialects were born. Fortification of the Île de la Cité failed to avert sacking by Vikings in 845 , but Paris's strategic importance—with its bridges preventing ships from passing—was established by successful defence in

3690-616: The French police and gendarmes arrested 12,884 Jews, including 4,115 children, and confined them during five days at the Vel d'Hiv ( Vélodrome d'Hiver ), from which they were transported by train to the extermination camp at Auschwitz . None of the children came back. On 25 August 1944, the city was liberated by the French 2nd Armoured Division and the 4th Infantry Division of the United States Army . General Charles de Gaulle led

3772-544: The OHV areas. In the 1963 film It's a Mad, Mad, Mad, Mad World , Ethel Merman 's character is seen talking on a pay telephone to her son, saying that she was "in a place called Plaster City." In 1993 Plaster City was briefly the locale of the fully restored Eureka locomotive, one of the last narrow gauge steam locomotives from the height of railroad development in the West. This Imperial County, California -related article

3854-472: The Place Royale, now Place des Vosges . In spite of Henry IV's efforts to improve city circulation, the narrowness of Paris's streets was a contributing factor in his assassination near Les Halles marketplace in 1610. During the 17th century, Cardinal Richelieu , chief minister of Louis XIII , was determined to make Paris the most beautiful city in Europe. He built five new bridges, a new chapel for

3936-587: The Revolution, but after 1799 it surged with 160,000 new residents, reaching 660,000 by 1815. Napoleon replaced the elected government of Paris with a prefect that reported directly to him. He began erecting monuments to military glory, including the Arc de Triomphe , and improved the neglected infrastructure of the city with new fountains, the Canal de l'Ourcq , Père Lachaise Cemetery and the city's first metal bridge,

4018-564: The Tuileries Palace. In 1793, as the revolution turned increasingly radical, the king, queen and mayor were beheaded by guillotine in the Reign of Terror , along with more than 16,000 others throughout France. The property of the aristocracy and the church was nationalised , and the city's churches were closed, sold or demolished. A succession of revolutionary factions ruled Paris until 9 November 1799 ( coup d'état du 18 brumaire ), when Napoleon Bonaparte seized power as First Consul. The population of Paris had dropped by 100,000 during

4100-570: The United States. Large open pit quarries are located in many places including Fort Dodge, Iowa , which sits on one of the largest deposits of gypsum in the world, and Plaster City, California , United States, and East Kutai , Kalimantan , Indonesia. Several small mines also exist in places such as Kalannie in Western Australia , where gypsum is sold to private buyers for additions of calcium and sulfur as well as reduction of aluminum toxicities on soil for agricultural purposes. Crystals of gypsum up to 11 m (36 ft) long have been found in

4182-495: The amount of toxic elements present. Gypsum precipitates onto brackish water membranes , a phenomenon known as mineral salt scaling , such as during brackish water desalination of water with high concentrations of calcium and sulfate . Scaling decreases membrane life and productivity. This is one of the main obstacles in brackish water membrane desalination processes, such as reverse osmosis or nanofiltration . Other forms of scaling, such as calcite scaling, depending on

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4264-418: The area, strongly opposed by area residents, was permanently prevented in 1933 when President Herbert Hoover declared the gypsum dunes a protected national monument . Gypsum is also formed as a by-product of sulfide oxidation , amongst others by pyrite oxidation , when the sulfuric acid generated reacts with calcium carbonate . Its presence indicates oxidizing conditions. Under reducing conditions,

4346-405: The capital of France, was the most populous city of Europe. By comparison, London in 1300 had 80,000 inhabitants. By the early fourteenth century, so much filth had collected inside urban Europe that French and Italian cities were naming streets after human waste. In medieval Paris, several street names were inspired by merde , the French word for "shit". During the Hundred Years' War , Paris

4428-431: The caves of the Naica Mine of Chihuahua , Mexico. The crystals thrived in the cave's extremely rare and stable natural environment. Temperatures stayed at 58 °C (136 °F), and the cave was filled with mineral-rich water that drove the crystals' growth. The largest of those crystals weighs 55 tonnes (61 short tons) and is around 500,000 years old. Synthetic gypsum is produced as a waste product or by-product in

4510-454: The centre stage of the French Revolution . On 14 July, a mob seized the arsenal at the Invalides , acquiring thousands of guns, with which it stormed the Bastille , a principal symbol of royal authority. The first independent Paris Commune , or city council, met in the Hôtel de Ville and elected a Mayor , the astronomer Jean Sylvain Bailly , on 15 July. Louis XVI and the royal family were brought to Paris and incarcerated in

4592-435: The city. In 1848, Louis-Philippe was overthrown by a popular uprising in the streets of Paris. His successor, Napoleon III , alongside the newly appointed prefect of the Seine, Georges-Eugène Haussmann , launched a huge public works project to build wide new boulevards, a new opera house, a central market, new aqueducts, sewers and parks, including the Bois de Boulogne and Bois de Vincennes . In 1860, Napoleon III annexed

4674-622: The crystal perfect cleavage along the sheets (in the {010} plane). Gypsum occurs in nature as flattened and often twinned crystals , and transparent, cleavable masses called selenite . Selenite contains no significant selenium ; rather, both substances were named for the ancient Greek word for the Moon . Selenite may also occur in a silky, fibrous form, in which case it is commonly called "satin spar". Finally, it may also be granular or quite compact. In hand-sized samples, it can be anywhere from transparent to opaque. A very fine-grained white or lightly tinted variety of gypsum, called alabaster ,

4756-402: The curfew led to violent confrontations between the police and demonstrators, in which at least 40 people were killed. The anti-independence Organisation armée secrète (OAS) carried out a series of bombings in Paris throughout 1961 and 1962. In May 1968, protesting students occupied the Sorbonne and put up barricades in the Latin Quarter . Thousands of Parisian blue-collar workers joined

4838-463: The east and the San Diego Metropolitan Transit System to the west. The route to the west is currently inactive. The first post office at Plaster City opened in 1924. The ZIP Code is 92251. Plaster City is surrounded by two Off-Highway Vehicle (OHV) Areas operated by the Bureau of Land Management : Plaster City West Off-Highway Vehicle Area and Plaster City East Off-Highway Vehicle Area.. The Juan Bautista de Anza National Historic Trail runs through

4920-443: The first Bishop of Paris: according to legend, when he refused to renounce his faith before the Roman occupiers, he was beheaded on the hill which became known as Mons Martyrum (Latin "Hill of Martyrs"), later " Montmartre ", from where he walked headless to the north of the city; the place where he fell and was buried became an important religious shrine, the Basilica of Saint-Denis , and many French kings are buried there. Clovis

5002-414: The first socialist mayor. He was re-elected in March 2008. In 2007, in an effort to reduce car traffic, he introduced the Vélib' , a system which rents bicycles. Bertrand Delanoë also transformed a section of the highway along the Left Bank of the Seine into an urban promenade and park, the Promenade des Berges de la Seine , which he inaugurated in June 2013. In 2007, President Nicolas Sarkozy launched

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5084-453: The front line at the First Battle of the Marne . The city was also bombed by Zeppelins and shelled by German long-range guns . In the years after the war, known as Les Années Folles , Paris continued to be a mecca for writers, musicians and artists from around the world, including Ernest Hemingway , Igor Stravinsky , James Joyce , Josephine Baker , Eva Kotchever , Henry Miller , Anaïs Nin , Sidney Bechet and Salvador Dalí . In

5166-413: The innermost three departments around Paris, airports and high-speed rail (TGV) stations, at an estimated cost of €35 billion. The system is scheduled to be completed by 2030. In January 2015, Al-Qaeda in the Arabian Peninsula claimed attacks across the Paris region. 1.5 million people marched in Paris in a show of solidarity against terrorism and in support of freedom of speech. In November of

5248-512: The late 12th century, Philip Augustus extended the Louvre fortress to defend the city against river invasions from the west, gave the city its first walls between 1190 and 1215, rebuilt its bridges to either side of its central island, and paved its main thoroughfares. In 1190, he transformed Paris's former cathedral school into a student-teacher corporation that would become the University of Paris and would draw students from all of Europe. With 200,000 inhabitants in 1328, Paris, then already

5330-490: The modern city of Paris was first mentioned in the mid-1st century BC by Julius Caesar as Luteciam Parisiorum (' Lutetia of the Parisii ') and is later attested as Parision in the 5th century AD, then as Paris in 1265. During the Roman period, it was commonly known as Lutetia or Lutecia in Latin, and as Leukotekía in Greek, which is interpreted as either stemming from the Celtic root *lukot- ('mouse'), or from * luto- ('marsh, swamp'). The name Paris

5412-450: The new site of the Bibliothèque nationale de France (1996), the Arche de la Défense (1985–1989) in La Défense , as well as the Louvre Pyramid with its underground courtyard (1983–1989); Jacques Chirac (2006), the Musée du quai Branly . In the early 21st century, the population of Paris began to increase slowly again, as more young people moved into the city. It reached 2.25 million in 2011. In March 2001, Bertrand Delanoë became

5494-442: The red clay of Roland Garros . Paris hosted the 1900 , the 1924 , and the 2024 Summer Olympics . The 1938 and 1998 FIFA World Cups , the 2019 FIFA Women's World Cup , the 2007 Rugby World Cup , as well as the 1960 , 1984 and 2016 UEFA European Championships were held in Paris. Every July, the Tour de France bicycle race finishes on the Avenue des Champs-Élysées in Paris. The ancient oppidum that corresponds to

5576-425: The same year, terrorist attacks , claimed by ISIL, killed 130 people and injured more than 350. On 22 April 2016, the Paris Agreement was signed by 196 nations of the United Nations Framework Convention on Climate Change in an aim to limit the effects of climate change below 2 °C. Paris is located in northern central France, in a north-bending arc of the river Seine , whose crest includes two islands,

5658-469: The students, and the movement grew into a two-week general strike. Supporters of the government won the June elections by a large majority. The May 1968 events in France resulted in the break-up of the University of Paris into 13 independent campuses. In 1975, the National Assembly changed the status of Paris to that of other French cities and, on 25 March 1977, Jacques Chirac became the first elected mayor of Paris since 1793. The Tour Maine-Montparnasse ,

5740-399: The sulfates it contains can be reduced back to sulfide by sulfate-reducing bacteria . This can lead to accumulation of elemental sulfur in oil-bearing formations, such as salt domes, where it can be mined using the Frasch process Electric power stations burning coal with flue gas desulfurization produce large quantities of gypsum as a byproduct from the scrubbers. Orbital pictures from

5822-417: The surrounding towns and created eight new arrondissements, expanding Paris to its current limits. During the Franco-Prussian War (1870–1871), Paris was besieged by the Prussian Army . Following several months of blockade, hunger, and then bombardment by the Prussians, the city was forced to surrender on 28 January 1871. After seizing power in Paris on 28 March, a revolutionary government known as

5904-463: The tallest building in the city at 57 storeys and 210 m (689 ft) high, was built between 1969 and 1973. It was highly controversial, and it remains the only building in the centre of the city over 32 storeys high. The population of Paris dropped from 2,850,000 in 1954 to 2,152,000 in 1990, as middle-class families moved to the suburbs. A suburban railway network, the RER (Réseau Express Régional),

5986-542: The throne Henry IV , after converting to Catholicism to gain entry to the capital, entered the city in 1594 to claim the crown of France. This king made several improvements to the capital during his reign: he completed the construction of Paris's first uncovered, sidewalk-lined bridge, the Pont Neuf , built a Louvre extension connecting it to the Tuileries Palace , and created the first Paris residential square,

6068-561: The water source, can also be important considerations in distillation , as well as in heat exchangers , where either the salt solubility or concentration can change rapidly. A new study has suggested that the formation of gypsum starts as tiny crystals of a mineral called bassanite (2CaSO 4 ·H 2 O). This process occurs via a three-stage pathway: The production of phosphate fertilizers requires breaking down calcium-containing phosphate rock with acid, producing calcium sulfate waste known as phosphogypsum (PG). This form of gypsum

6150-495: The world including Pablo Picasso , Modigliani , and Henri Matisse made Paris their home. It was the birthplace of Fauvism , Cubism and abstract art , and authors such as Marcel Proust were exploring new approaches to literature. During the First World War , Paris sometimes found itself on the front line; 600 to 1,000 Paris taxis played a small but highly important symbolic role in transporting 6,000 soldiers to

6232-401: The year. Paris is known for intermittent, abrupt, heavy showers. The highest recorded temperature was 42.6 °C (108.7 °F), on 25 July 2019. The lowest was −23.9 °C (−11.0 °F), on 10 December 1879. For almost all of its long history, except for a few brief periods, Paris was governed directly by representatives of the king, emperor, or president of France. In 1974, Paris

6314-476: The years after the peace conference , the city was also home to growing numbers of students and activists from French colonies and other Asian and African countries, who later became leaders of their countries, such as Ho Chi Minh , Zhou Enlai and Léopold Sédar Senghor . On 14 June 1940, the German army marched into Paris, which had been declared an " open city ". On 16–17 July 1942, following German orders,

6396-788: Was built to complement the Métro; the Périphérique expressway encircling the city, was completed in 1973. Most of the postwar presidents of the Fifth Republic wanted to leave their own monuments in Paris; President Georges Pompidou started the Centre Georges Pompidou (1977), Valéry Giscard d'Estaing began the Musée d'Orsay (1986); President François Mitterrand had the Opéra Bastille built (1985–1989),

6478-525: Was filled in from around the 10th century, Paris's cultural centre began to move to the Right Bank. In 1137, a new city marketplace (today's Les Halles ) replaced the two smaller ones on the Île de la Cité and Place de Grève (Place de l'Hôtel de Ville) . The latter location housed the headquarters of Paris's river trade corporation, an organisation that later became, unofficially (although formally in later years), Paris's first municipal government. In

6560-471: Was known in Old English as spærstān , "spear stone", referring to its crystalline projections. Thus, the word spar in mineralogy, by comparison to gypsum, refers to any non- ore mineral or crystal that forms in spearlike projections. In the mid-18th century, the German clergyman and agriculturalist Johann Friderich Mayer investigated and publicized gypsum's use as a fertilizer. Gypsum may act as

6642-618: Was occupied by England-friendly Burgundian forces from 1418, before being occupied outright by the English when Henry V of England entered the French capital in 1420; in spite of a 1429 effort by Joan of Arc to liberate the city, it would remain under English occupation until 1436. In the late 16th-century French Wars of Religion , Paris was a stronghold of the Catholic League , the organisers of 24 August 1572 St. Bartholomew's Day massacre in which thousands of French Protestants were killed. The conflicts ended when pretender to

6724-556: Was originally called Lutetia (more fully, Lutetia Parisiorum , "Lutetia of the Parisii", modern French Lutèce ). It became a prosperous city with a forum, baths, temples, theatres, and an amphitheatre . By the end of the Western Roman Empire , the town was known as Parisius , a Latin name that would later become Paris in French. Christianity was introduced in the middle of the 3rd century AD by Saint Denis ,

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