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123-424: The entire lake basin is now almost completely occupied by Mexico City , the capital of the present-day nation of Mexico . Drainage of the lake has led to serious ecological and human consequences. The local climate and water availability have changed considerably, contributing to water scarcity in the area; subsequent groundwater extraction leads to land subsidence under much of the city. Native species endemic to

246-421: A subtropical highland climate ( Köppen climate classification Cwb ), due to its tropical location but high elevation. The lower region of the valley receives less rainfall than the upper regions of the south; the lower boroughs of Iztapalapa , Iztacalco , Venustiano Carranza and the east portion of Gustavo A. Madero are usually drier and warmer than the upper southern boroughs of Tlalpan and Milpa Alta ,

369-751: A central role in the mound-building peoples' religious life. Documented uses include semi-public chief 's house platforms, public temple platforms, mortuary platforms, charnel house platforms, earth lodge /town house platforms, residence platforms, square ground and rotunda platforms, and dance platforms. Cultures that built substructure mounds include the Troyville culture , Coles Creek culture , Plaquemine culture and Mississippian cultures . Many square flat-topped mound tombs in China . The first emperor Qin Shi Huang ( c.  221 BC , who unified

492-716: A circular plan survives at the site of Cuicuilco , now inside Mexico City and mostly covered with lava from an eruption of the Xitle Volcano in the 1st century BC. Several circular stepped pyramids called Guachimontones survive in Teuchitlán, Jalisco . Pyramids in Mexico were often used for human sacrifice . Harner stated that for the dedication of the Great Pyramid of Tenochtitlan in 1487, "one source states 20,000, another 72,344, and several give 80,400" as

615-430: A diameter of 6.5 m (21.3 ft) and carries rain water out of the basin. The eastern discharge tunnel was inaugurated in 2019. The ecological consequences of the draining were enormous. Parts of the valleys were turned semi-arid, and even today Mexico City suffers from lack of water. Due to overdrafting that is depleting the aquifer beneath the city, Mexico City is estimated to have sunk 10 meters (33 feet) in

738-518: A flow that was mitigated by the construction of dikes and causeways in the Late Postclassic period (1200–1521 CE) of Mesoamerican chronology . Lake Texcoco was the lowest-lying of all the lakes, and occupied the minimum elevation in the valley so that water ultimately drained towards it. The Valley of Mexico is a closed or endorheic basin . Because there is no outflow, evapotranspiration is estimated to be 72–79% of precipitation. Between

861-550: A legendary struggle for the throne of Argos and another that he was told was the tomb of Argives killed in a battle around 669/8 BC. Neither survives and no evidence indicates that they resembled Egyptian pyramids. At least two surviving pyramid-like structures are available to study, one at Hellenikon and the other at Ligourio/Ligurio, a village near the ancient theatre Epidaurus . These buildings have inwardly sloping walls, but bear no other resemblance to Egyptian pyramids. They had large central rooms (unlike Egyptian pyramids) and

984-720: A major success that ended the war. The American invasion into the Federal District was first resisted during the Battle of Churubusco on 8 August, where the Saint Patrick's Battalion , which was composed primarily of Catholic Irish and German immigrants but also Canadians, English, French, Italians, Poles, Scots, Spaniards, Swiss, and Mexicans, fought for the Mexican cause, repelling the American attacks. After defeating

1107-609: A member of the Party of the Democratic Revolution . Discontent over the election eventually led Cuauhtémoc Cárdenas to become the first elected mayor of Mexico City in 1997. Cárdenas promised a more democratic government , and his party claimed some victories against crime, pollution, and other major problems. He resigned in 1999 to run for the presidency. Mexico City is located in the Valley of Mexico, sometimes called

1230-469: A mountainous region of pine and oak trees known as the range of Ajusco . The average annual temperature varies from 12 to 16 °C (54 to 61 °F), depending on the altitude of the borough. The temperature is rarely below 3 °C (37 °F) or above 30 °C (86 °F). At the Tacubaya observatory, the lowest temperature ever registered was −4.4 °C (24 °F) on 13 February 1960, and

1353-626: A new king, Cuitláhuac , but he soon died; the next king was Cuauhtémoc . Cortés began a siege of Tenochtitlan in May 1521. For three months, the city suffered from the lack of food and water as well as the spread of smallpox brought by the Europeans. Cortés and his allies landed their forces in the south of the island and slowly fought their way through the city. Cuauhtémoc surrendered in August 1521. The Spaniards practically razed Tenochtitlan during

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1476-543: A third of those in 1992. The levels of signature pollutants in Mexico City are similar to those of Los Angeles . Despite the cleanup, the metropolitan area is still the most ozone -polluted part of the country, with ozone levels 2.5 times beyond WHO -defined safe limits. To clean up pollution, the federal and local governments implemented numerous plans including the constant monitoring and reporting of environmental conditions, such as ozone and nitrogen oxides . When

1599-488: A way not seen in other parts of the Americas. Spaniards encountered a society in which the concept of nobility mirrored that of their own. Spaniards respected the indigenous order of nobility and added to it. In the ensuing centuries, possession of a noble title in Mexico did not mean one exercised great political power, for one's power was limited even if the accumulation of wealth was not. The concept of nobility in Mexico

1722-472: A year by American troops in the framework of the Mexican–American War (1847–1848). The Battle for Mexico City was the series of engagements from 8 to 15 September 1847, in the general vicinity of Mexico City during the U.S. Mexican War . Included are major actions at the battles of Molino del Rey and Chapultepec , culminating with the fall of Mexico City. The U.S. Army under Winfield Scott scored

1845-407: Is a structure whose visible surfaces are triangular in broad outline and converge toward the top, making the appearance roughly a pyramid in the geometric sense . The base of a pyramid can be of any polygon shape, such as triangular or quadrilateral , and its lines either filled or stepped. A pyramid has the majority of its mass closer to the ground with less mass towards the pyramidion at

1968-507: Is a great paleontological field , with a great amount of pleistocenic fauna . The Lake was primarily fed by snowmelt and rain runoff when the Mexico Valley had a temperate climate. Between 11,000 and 6,000 years ago, the climate naturally warmed and snowfall in central Mexico became less prevalent. This caused the water level of the lake to drop over the next several millennia. Remnants of the ancient shoreline that Lake Texcoco had from

2091-458: Is assumed that they had shrines at the top, but no archaeological evidence supports this and the only textual evidence is from Herodotus . Access to the shrine would have been by a series of ramps on one side of the ziggurat or by a spiral ramp from base to summit. The most famous African pyramids are in Egypt — huge structures built of bricks or stones, primarily limestone, some of which are among

2214-486: Is colloquially known as Chilangolandia after the locals' nickname chilangos . Chilango is used pejoratively by people living outside Mexico City to "connote a loud, arrogant, ill-mannered, loutish person". For their part those living in Mexico City designate insultingly those who live elsewhere as living in la provincia ('the provinces', 'the periphery') and many proudly embrace the term chilango. Residents of Mexico City are more recently called defeños (deriving from

2337-650: Is that these pyramids were inspired by the Borobudur monument through Sumatran and Javanese monks. A similar Buddhist monument survives in Vrang , Tajikistan . At least nine Buddhist step pyramids survive, 4 from former Gyeongsang Province of Korea, 3 from Japan, 1 from Indonesia (Borobudur) and 1 from Tajikistan . Several pyramids were erected throughout the Pacific islands, such as Puʻukoholā Heiau in Hawaii ,

2460-586: Is the capital and largest city of Mexico , and the most populous city in North America . It is one of the most important cultural and financial centers in the world. Mexico City is located in the Valley of Mexico within the high Mexican central plateau , at an altitude of 2,240 meters (7,350 ft). The city has 16 boroughs or demarcaciones territoriales , which are in turn divided into neighborhoods or colonias . The 2020 population for

2583-594: Is the oldest capital city in the Americas and one of two founded by Indigenous people . The city was originally built on a group of islands in Lake Texcoco by the Mexica around 1325, under the name Tenochtitlan . It was almost completely destroyed in the 1521 siege of Tenochtitlan and subsequently redesigned and rebuilt in accordance with the Spanish urban standards . In 1524, the municipality of Mexico City

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2706-1176: The Airavatesvara Temple at Darasuram . However, the largest temple (area) is the Ranganathaswamy Temple in Srirangam, Tamil Nadu . The Thanjavur temple was built by Raja Raja Chola in the 11th century. The Brihadisvara Temple was declared a World Heritage Site by UNESCO in 1987; the Temple of Gangaikondacholapuram and the Airavatesvara Temple at Darasuram were added in 2004. Austronesian megalithic culture in Indonesia featured earth and stone step pyramid structures called punden berundak. These were discovered in Pangguyangan near Cisolok and in Cipari near Kuningan. The stone pyramids were based on beliefs that mountains and high places were

2829-676: The Alameda Central , it is recognized as the oldest public park in the Americas . Parque México and Parque España in the hip Condesa district; Parque Hundido and Parque de los Venados in Colonia del Valle , and Parque Lincoln in Polanco . There are many smaller parks throughout the city. Most are small "squares" occupying two or three square blocks amid residential or commercial districts. Several other larger parks such as

2952-542: The Bosque de Tlalpan  [ es ; no ] and Viveros de Coyoacán , and in the east Alameda Oriente  [ es ] , offer many recreational activities. Northwest of the city is a large ecological reserve, the Bosque de Aragón  [ ceb ; es ; no ] . In the southeast is the Xochimilco Ecological Park and Plant Market , a World Heritage Site . West of Santa Fe district are

3075-664: The Ecobici bike-sharing were among efforts to encourage alternate, greener forms of transportation. Chapultepec , the city's most iconic public park, has history back to the Aztec emperors who used the area as a retreat. It is south of Polanco district, and houses the Chapultepec Zoo the main city's zoo, several ponds and seven museums, including the National Museum of Anthropology . Other iconic city parks include

3198-597: The Federal District (Spanish: Distrito Federal or D.F. ) and is now officially known as Ciudad de México (or CDMX ), with a greater degree of autonomy. A clause in the Constitution of Mexico , however, prevents it from becoming a state within the Mexican federation, as long it remains the capital of the country. Mexico City was traditionally known as La Ciudad de los Palacios ("the City of

3321-491: The Pleistocene epoch and the last glacial period , the lake occupied the entire Mexico Valley. Lake Texcoco reached its maximum extent 11,000 years ago with a size of about 2,189 square miles (5,670 km) and over 500 feet (150 m) deep. When the lake's water level fell it created several paleo-lakes that would connect with each other from time to time. At the north in the modern community of San Miguel Tocuilla there

3444-932: The Pulemelei Mound in Samoa , and Nan Madol in Pohnpei . With the Egyptian Revival movement in the nineteenth and early twentieth century, pyramids became more common in funerary architecture. The tomb of Quintino Sella , outside the monumental cemetery of Oropa , is pyramid-shaped. This style was popular with tycoons in the US. The Schoenhofen Pyramid Mausoleum (1889) in Chicago and Hunt's Tomb (1930) in Phoenix, Arizona are notable examples. Some people build pyramid tombs for themselves. Nicolas Cage bought

3567-561: The Saint Patrick's Battalion , the Mexican–American War came to a close after the United States deployed combat units deep into Mexico resulting in the capture of Mexico City and Veracruz by the U.S. Army's 1st, 2nd, 3rd and 4th Divisions . The invasion culminated with the storming of Chapultepec Castle in the city itself. During this battle, on 13 September, the 4th Division, under John A. Quitman , spearheaded

3690-611: The Sumerians , Babylonians , Elamites , Akkadians , and Assyrians . Each ziggurat was part of a temple complex that included other buildings. The ziggurat's precursors were raised platforms that date from the Ubaid period of the fourth millennium BC. The earliest ziggurats began near the end of the Early Dynastic Period . The original pyramidal structure, the anu ziggurat, dates to around 4000 BC. The White Temple

3813-509: The Toltec , and Mexica (Aztecs) cultures. The latter arrived around the 14th century to settle first on the shores of the lake. The city of Mexico-Tenochtitlan was founded by the Mexica people in 1325 or 1327. The old Mexica city that is now referred to as Tenochtitlan was built on an island in the center of the inland lake system of the Valley of Mexico , which is shared with a smaller city-state called Tlatelolco . According to legend,

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3936-706: The Twelve Apostles of Mexico who arrived in New Spain in 1524, described the rebuilding of the city as one of the afflictions or plagues of the early period: The seventh plague was the construction of the great City of Mexico, which, during the early years used more people than in the construction of Jerusalem. The crowds of laborers were so numerous that one could hardly move in the streets and causeways, although they are very wide. Many died from being crushed by beams, or falling from high places, or in tearing down old buildings for new ones. Preconquest Tenochtitlan

4059-496: The apex . This is due to the gradual decrease in the cross-sectional area along the vertical axis with increasing elevation. This offers a weight distribution that allowed early civilizations to create monumental structures. Civilizations in many parts of the world have built pyramids. The largest pyramid by volume is the Mesoamerican Great Pyramid of Cholula , in the Mexican state of Puebla . For millennia,

4182-486: The city proper was 9,209,944, with a land area of 1,495 square kilometers (577 sq mi). According to the most recent definition agreed upon by the federal and state governments, the population of Greater Mexico City is 21,804,515, which makes it the sixth-largest metropolitan area in the world, the second-largest urban agglomeration in the Western Hemisphere (behind São Paulo , Brazil ), and

4305-480: The feudal era, e.g. as the tower of Oviedo 's Gothic Cathedral of San Salvador . Andean cultures used pyramids in various architectural structures such as the ones in Caral , Túcume and Chavín de Huantar , constructed around the same time as early Egyptian pyramids. Several Mesoamerican cultures built pyramid-shaped structures. Mesoamerican pyramids were usually stepped, with temples on top, more similar to

4428-789: The largest structures on Earth were pyramids—first the Red Pyramid in the Dashur Necropolis and then the Great Pyramid of Khufu , both in Egypt —the latter is the only extant example of the Seven Wonders of the Ancient World . The Mesopotamians built the earliest pyramidal structures, called ziggurats . In ancient times, these were brightly painted in gold / bronze . They were constructed of sun-dried mud-brick, and little remains of them. Ziggurats were built by

4551-518: The massacre of an unknown number of protesting students in Tlatelolco . Three years later, a demonstration in the Maestros avenue, organized by former members of the 1968 student movement, was violently repressed by a paramilitary group called " Los Halcones ", composed of gang members and teenagers from many sports clubs who received training in the US. On 19 September 1985, at 7:19am CST ,

4674-473: The 5th and 4th centuries. Normally this technique is used for dating pottery , but researchers used it to try to date stone flakes from the structure walls. This launched debate about whether or not these structures are actually older than Egypt , part of the Black Athena controversy. Lefkowitz criticised this research, suggesting that some of the research was done not to determine the reliability of

4797-538: The Basin of Mexico. This valley is located in the Trans-Mexican Volcanic Belt in the high plateaus of south-central Mexico. It has a minimum altitude of 2,200 meters (7,200 feet) above sea level and is surrounded by mountains and volcanoes that reach elevations of over 5,000 meters (16,000 feet). This valley has no natural drainage outlet for the waters that flow from the mountainsides, making

4920-572: The City of Lakes . If approved by the government the project will contribute to the supply of water from natural sources to the Valley of Mexico , the creation of new natural spaces, a great improvement in air quality, and greater population establishment planning. By the 1990s Mexico City had become infamous as one of the world's most polluted cities; however, the city has since become a model for drastically lowering pollution levels. By 2014 carbon monoxide pollution had dropped drastically, while sulfur dioxide and nitrogen dioxide were at levels about

5043-631: The Egyptian ones. Pyramids were built in Sudan as late as 200 AD. The Tomb of Askia, in Gao , Mali , is believed to be the burial place of Askia Mohammad I , one of the Songhai Empire 's most prolific emperors . It was built at the end of the fifteenth century and is designated as a UNESCO World Heritage Site . UNESCO describes the tomb as an example of the monumental mud-building traditions of

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5166-633: The Gulf of Mexico and the Pacific Ocean. After landing in Veracruz , Spanish explorer Hernán Cortés advanced upon Tenochtitlan with the aid of many of the other native peoples, arriving there on 8 November 1519. Cortés and his men marched along the causeway leading into the city from Iztapalapa (Ixtapalapa), and the city's ruler, Moctezuma II , greeted the Spaniards; they exchanged gifts, but

5289-547: The Hellenikon structure is rectangular rather than square, 12.5 by 14 metres (41 by 46 ft) which means that the sides could not have met at a point. The stone used to build these structures was limestone quarried locally and was cut to fit, not into freestanding blocks like the Great Pyramid of Giza. These structures were dated from pot shards excavated from the floor and grounds. The latest estimates are around

5412-637: The Mesopotamian ziggurat than the Egyptian pyramid. The largest by volume is the Great Pyramid of Cholula , in the Mexican state of Puebla . Constructed from the 3rd century BC to the 9th century AD, this pyramid is the world's largest monument, and is still not fully excavated. The third largest pyramid in the world, the Pyramid of the Sun , at Teotihuacan , is also located in Mexico . An unusual pyramid with

5535-576: The Mexican wolf. Other guests are the golden eagle, pronghorn, bighorn sheep, caracara, zebras, African elephant, macaw, hippo, among others. Zoo Los Coyotes is a 27.68-acre (11.2 ha) zoo located south of Mexico City in the Coyoacan. It was inaugurated on 2 February 1999. It has more than 301 specimens of 51 species of wild native or endemic fauna from the area, featuring eagles, ajolotes, coyotes, macaws, bobcats, Mexican wolves, raccoons, mountain lions, teporingos, foxes, white-tailed deer. Mexico City has

5658-559: The Mexicas' principal god, Huitzilopochtli , indicated the site where they were to build their home by presenting a golden eagle perched on a prickly pear devouring a rattlesnake . Between 1325 and 1521, Tenochtitlan grew in size and strength, eventually dominating the other city-states around Lake Texcoco and in the Valley of Mexico. When the Spaniards arrived, the Aztec Empire had reached much of Mesoamerica , touching both

5781-403: The Miguel Hidalgo. It was opened in 1924. Visitors can see about 243 specimens of different species including kangaroos, giant panda, gorillas, caracal, hyena, hippos, jaguar, giraffe, lemur, lion, among others. Zoo San Juan de Aragon is near the San Juan de Aragon Park in the Gustavo A. Madero. In this zoo, opened in 1964, there are species that are in danger of extinction such as the jaguar and

5904-403: The Nigerian town of Nsude, northern Igboland . Ten pyramidal structures were built of clay/mud. The first base section was 60 ft (18 m) in circumference and 3 ft (0.9 m) in height. The next stack was 45 ft (14 m) in circumference. Circular stacks continued to the top. The structures were temples for the god Ala , who was believed to reside there. A stick was placed at

6027-412: The Palaces"), a nickname attributed to Baron Alexander von Humboldt when visiting the city in the 19th century, who, sending a letter back to Germany, said Mexico City could rival any major city in Europe. But it was English politician Charles Latrobe who really penned the following: "... look at their works: the moles, aqueducts, churches, roads—and the luxurious City of Palaces which has risen from

6150-421: The Spanish preserved Tenochtitlan's basic layout, they built Catholic churches over the old Aztec temples and claimed the imperial palaces for themselves. Tenochtitlan was renamed "Mexico" because the Spanish found the word easier to pronounce. The city had been the capital of the Aztec Empire and in the colonial era, Mexico City became the capital of New Spain . The viceroy of Mexico or vice-king lived in

6273-406: The West African Sahel . The complex includes the pyramidal tomb, two mosques , a cemetery and an assembly ground. At 17 metres (56 ft) in height it is the largest pre- colonial architectural monument in Gao. It is a notable example of the Sudano-Sahelian architectural style that later spread throughout the region. One of the unique structures of Igbo culture was the Nsude pyramids, in

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6396-645: The abode for the spirit of the ancestors . The step pyramid is the basic design of the 8th century Borobudur Buddhist monument in Central Java . However later Java temples were influenced by Indian Hindu architecture , as exemplified by the spires of Prambanan temple. In the 15th century, during late Majapahit period, Java saw the revival of indigenous Austronesian elements as displayed by Sukuh temple that somewhat resemble Mesoamerican pyramids, and also stepped pyramids of Mount Penanggungan. In east Asia, Buddhist stupas were usually represented as tall pagodas . However, some pyramidal stupas survive. One theory

6519-510: The air is relatively drier, the driest month being December. This season is subdivided into a cold winter period and a warm spring period. The cold period spans from November to February, when polar air masses push down from the north and keep the air fairly dry. The warm period extends from March to May when subtropical winds again dominate but do not yet carry enough moisture for rain to form. Pyramid A pyramid (from Ancient Greek πυραμίς ( puramís )  'pyramid')

6642-442: The ancient lake bed. Also there are small remnants of the lakes of Xochimilco , Chalco , and Zumpango . Several species indigenous to the lake are now extinct or endangered (e.g. axolotls ). The modern Texcoco Lake has a high concentration of salts and its waters are evaporated for their processing. A Mexican company, "Sosa Texcoco S.A." has an 800-hectare (2,000-acre) solar evaporator known as El Caracol . Land reclamation of

6765-426: The area closest to the main square in what was known as the traza , in orderly, well laid-out streets. Indigenous residences were outside that exclusive zone and houses were haphazardly located. Spaniards sought to keep indigenous people separate but since the Zócalo was a center of commerce for Amerindians, they were a constant presence in the central area, so strict segregation was never enforced. At intervals Zócalo

6888-446: The area was struck by the 1985 Mexico City earthquake . The earthquake proved to be a disaster politically for the one-party state government. The Mexican government was paralyzed by its own bureaucracy and corruption, forcing ordinary citizens to create and direct their own rescue efforts and to reconstruct much of the housing that was lost as well. However, the last straw may have been the controversial elections of 1988. That year,

7011-451: The armies of Pancho Villa and Emiliano Zapata , but the city did not experience violence. Huerta had abandoned the capital and the conquering armies marched in. Venustiano Carranza 's Constitutionalist faction ultimately prevailed in the revolutionary civil war and Carranza took up residence in the presidential palace. In the 20th century the phenomenal growth of the city and its environmental and political consequences dominate. In 1900,

7134-404: The army stronghold of the ciudadela or citadel, with significant civilian casualties and the undermining of confidence in the Madero government. Victoriano Huerta , chief general of the Federal Army , saw a chance to take power, forcing Madero and Pino Suarez to sign resignations. The two were murdered later while on their way to Lecumberri prison . Huerta's ouster in July 1914 saw the entry of

7257-433: The attack against Chapultepec and carried the castle. Future Confederate generals George E. Pickett and James Longstreet participated in the attack. Serving in the Mexican defense were the cadets later immortalized as Los Niños Héroes (the "Boy Heroes"). The Mexican forces fell back from Chapultepec and retreated within the city. Attacks on the Belén and San Cosme Gates came afterwards. The treaty of Guadalupe Hidalgo

7380-448: The camaraderie did not last long. Cortés put Moctezuma under house arrest , hoping to rule through him. Tensions increased until, on the night of 30 June 1520 – during a struggle known as " La Noche Triste " – the Aztecs rose up against the Spanish intrusion and managed to capture or drive out the Europeans and their Tlaxcalan allies. Cortés regrouped at Tlaxcala. The Aztecs thought the Spaniards were permanently gone, and they elected

7503-445: The capital. The 16th century saw a proliferation of churches, many of which can still be seen today in the historic center . Economically, Mexico City prospered as a result of trade. Unlike Brazil or Peru , Mexico had easy contact with both the Atlantic and Pacific worlds. Although the Spanish crown tried to completely regulate all commerce in the city, it had only partial success. The concept of nobility flourished in New Spain in

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7626-444: The channels and a tunnel to the Pánuco River , but even that could not stop floods, since by then most of the city was under the water table . The flooding could not be completely controlled until the twentieth century. In 1967, construction of the Drenaje Profundo ("Deep Drainage System"), a network of several hundred kilometers of tunnels, was done, at a depth between 30 and 250 m (98 and 820 ft). The central tunnel has

7749-413: The city vulnerable to flooding. Drainage was engineered through the use of canals and tunnels starting in the 17th century. Mexico City primarily rests on what was Lake Texcoco . Seismic activity is frequent there. Lake Texcoco was drained starting from the 17th century. Although none of the lake waters remain, the city rests on the lake bed's heavily saturated clay. This soft base is collapsing due to

7872-425: The clay-built ruins of Tenochtitlan...", on page 84 of the Letter V of The Rambler in Mexico . During the colonial period, the city's motto was "Muy Noble e Insigne, Muy Leal e Imperial" (Very Noble and Distinguished, Very Loyal and Imperial). During Andrés Manuel López Obrador 's administration a political slogan was introduced: la Ciudad de la Esperanza ( lit.   ' The City of Hope ' ). This motto

7995-438: The colonial period to work on infrastructure to prevent flooding. Floods were not only an inconvenience but also a health hazard, since during flood periods human waste polluted the city's streets. By draining the area, the mosquito population dropped as did the frequency of the diseases they spread. However, draining the wetlands also changed the habitat for fish and birds and the areas accessible for indigenous cultivation close to

8118-439: The construction of large sporting facilities. In 1969, the Mexico City Metro was inaugurated. Explosive growth in the population of the city started in the 1960s, with the population overflowing the boundaries of the Federal District into the neighboring State of Mexico, especially to the north, northwest, and northeast. Between 1960 and 1980 the city's population more than doubled to nearly 9 million. In 1980, half of all

8241-419: The dating method, as was suggested, but to back up a claim and to make points about pyramids and Greek civilization. She claimed that not only were the results imprecise, but that other structures mentioned in the research are not in fact pyramids, e.g. a tomb alleged to be the tomb of Amphion and Zethus near Thebes , a structure at Stylidha ( Thessaly ) which is a long wall, etc. She pushed the possibility that

8364-436: The district of Chacona, part of the town of Güímar on the island of Tenerife in the Canary Islands . The structures were dated to the 19th century and their function explained as a byproduct of contemporary agricultural techniques. Autochthonous Guanche traditions as well as surviving images indicate that similar structures (also known as, "Morras", "Majanos", "Molleros", or "Paredones") were built in many locations on

8487-429: The draining of Lake Texcoco and global warming have greatly reduced snowfalls after the snow flurries of 12 February 1907. Since 1908, snow has only fallen three times, snow on 14 February 1920; snow flurries on 14 March 1940; and on 12 January 1967, when 8 centimeters (3 in) of snow fell on the city, the most on record. The 1967 snowstorm coincided with the operation of Deep Drainage System that resulted in

8610-443: The final siege of the conquest. Cortés first settled in Coyoacán , but decided to rebuild the Aztec site to erase all traces of the old order. He did not establish a territory under his own personal rule , but remained loyal to the Spanish crown. The first Spanish viceroy arrived in Mexico City fourteen years later. By that time, the city had again become a city-state , having power that extended far beyond its borders. Although

8733-517: The highest temperature on record was 34.7 °C (94.5 °F) on 25 May 2024. Overall precipitation is heavily concentrated in the summer months, and includes dense hail . Snow falls in the city scarcely, although somewhat more often on nearby mountaintops. Throughout its history, the Central Valley of Mexico was accustomed to having several snowfalls per decade (including a period between 1878 and 1895 in which every single year—except 1880—recorded snowfalls ), mostly lake-effect snow . The effects of

8856-632: The hills, such as those in the Valley of the Kings in Luxor's West Bank. In Medinat Habu and Deir el-Medina , smaller pyramids were built by individuals. Smaller pyramids with steeper sides were built by the Nubians who ruled Egypt in the Late Period. The Great Pyramid of Giza is the largest in Egypt and one of the largest in the world. At 146.6 metres (481 ft) it was the tallest structure in

8979-610: The industrial jobs in Mexico were located in Mexico City. Under relentless growth, the Mexico City government could barely keep up with services. Villagers from the countryside who continued to pour into the city to escape poverty only compounded the city's problems. With no housing available, they took over lands surrounding the city, creating huge shanty towns . The inhabitants of Mexico City faced serious air pollution and water pollution problems, as well as groundwater-related subsidence . Air and water pollution has been contained and improved in several areas due to government programs,

9102-655: The insurgency, occurred four days later. After a decade of war, Mexico's independence from Spain was effectively declared in the Declaration of Independence of the Mexican Empire on 27 September 1821. Agustín de Iturbide is proclaimed Emperor of the First Mexican Empire by Congress, crowned in the Cathedral of Mexico . The Mexican Federal District was established by the new government and by

9225-655: The island. However, over time they were dismantled and used as building material. Güímar hostred nine pyramids, only six of which survive. The 27-metre-high Pyramid of Cestius was built by the end of the 1st century BC and survives close to the Porta San Paolo . Another, named Meta Romuli , stood in the Ager Vaticanus (today's Borgo ), but was destroyed at the end of the 15th century. Pyramids were occasionally used in Christian architecture during

9348-460: The lake flooded the city, with an even more severe flood following in 1607. Under the direction of Enrico Martínez , a drain was built to control the level of the lake, but in 1629 another flood kept most of the city covered for five years. At that time, it was debated whether to relocate the city, but the Spanish authorities decided to keep the existing location. Eventually the lake was drained by

9471-661: The lake region, such as the axolotl , have become severely endangered or extinct due to ecosystem change. After the cancellation of the Mexico City Texcoco Airport , the government initiated a major restoration project of a significant part of the lake in the form of the Lake Texcoco Ecological Park , 14,000 hectares of public space and ecological restoration. The Valley of Mexico is a basin with an average elevation of 2,236 m (7,336 ft) above mean sea level located in

9594-538: The lakebed was part of Mexico's attempts at development in the twentieth century. The Lake Texcoco Ecological Park , officially called Parque Ecológico Lago de Texcoco (PELT), is a national park in the State of Mexico , and a federal government project. It is part of the larger metropolitan area in the Valley of Mexico , around Mexico City . The planned area for the park is 14,000 ha (35,000 acres), of which 4,800 ha (12,000 acres) will be public spaces. The park

9717-517: The largest Spanish-speaking city (city proper) in the world. Greater Mexico City has a GDP of $ 411 billion in 2011, which makes it one of the most productive urban areas in the world . The city was responsible for generating 15.8% of Mexico's GDP, and the metropolitan area accounted for about 22% of the country's GDP. If it were an independent country in 2013, Mexico City would be the fifth-largest economy in Latin America . Mexico City

9840-418: The last century. Furthermore, because soft lake sediments underlie most of Mexico City, the city has proven vulnerable to soil liquefaction during earthquakes, most notably in the 1985 earthquake when hundreds of buildings collapsed and thousands of people died. The term "Texcoco Lake" now refers only to a big area surrounded by salt marshes 4 km (2.5 mi) east of Mexico City, which covers part of

9963-441: The last glacial period can be seen on some slopes of Mount Tlaloc as well as mountains west of Mexico City. The disarticulated remains of seven Columbian mammoths dated between 10,220 ± 75 and 12,615 ± 95 years ( BP ) were found, suggesting human presence. It is believed that the lake disappeared and re-formed at least 10 times in the last 30,000 years. Agriculture around the lake began about 7,000 years ago, with humans following

10086-465: The last half of the 18th century. Many of these palaces can still be seen today, leading to Mexico City's nickname of "The city of palaces" given by Alexander Von Humboldt . The Grito de Dolores ("Cry of Dolores"), also known as El Grito de la Independencia ("Cry of Independence"), marked the beginning of the Mexican War of Independence . The Battle of Guanajuato, the first major engagement of

10209-452: The levels of these two pollutants reached critical levels, contingency actions were implemented which included closing factories, changing school hours, and extending the A day without a car program to two days of the week. The government also instituted industrial technology improvements, a strict biannual vehicle emission inspection and the reformulation of gasoline and diesel fuels . The introduction of Metrobús bus rapid transit and

10332-564: The lower Cenolithic period (9500–7000 BC). However, a 2003 study placed the age of the Peñon woman at 12,700 years old (calendar age), one of the oldest human remains discovered in the Americas. Studies of her mitochondrial DNA suggest she was either of Asian or European or Aboriginal Australian origin. The area was the destination of the migrations of the Teochichimecas during the 8th and 13th centuries, people that would give rise to

10455-489: The main campus of the National Autonomous University of Mexico . Designed by the most prestigious architects of the era, including Mario Pani , Eugenio Peschard , and Enrique del Moral , the buildings feature murals by artists Diego Rivera , David Alfaro Siqueiros , and José Chávez Morado . It has since been recognized as a UNESCO World Heritage Site . The 1968 Olympic Games brought about

10578-424: The metropolitan area. The area receives about 820 millimeters (32 in) of annual rainfall, which is concentrated from May through October with little or no precipitation for the remainder of the year. The area has two main seasons. The wet humid summer runs from May to October when winds bring in tropical moisture from the sea, the wettest month being July. The cool sunny winter runs from November to April, when

10701-516: The next 200 years when its famous conical pyramid was built. The Xitle volcano destroyed Cuicuilco around AD 30, a destruction that may have given rise to Teotihuacan . After the fall of Teotihuacan, AD 600–800, several other city states appeared around the lake, including Xoloc, Azcapotzalco , Tlacopan , Coyohuacan, Culhuacán, Chimalpa, and Chimalhuacán – mainly from Toltec and Chichimeca influence. None of these predominated and they coexisted more or less in peace for several centuries. This time

10824-464: The number of humans sacrificed. Many pre-Columbian Native American societies of ancient North America built large pyramidal earth structures known as platform mounds . Among the largest and best-known of these structures is Monks Mound at the site of Cahokia in what became Illinois , completed around 1100 AD. It has a base larger than that of the Great Pyramid. Many mounds underwent repeated episodes of expansion. They are believed to have played

10947-508: The old Aztec ceremonial center. The existing central plaza of the Aztecs was effectively and permanently transformed to the ceremonial center and seat of power during the colonial period, and remains to this day in modern Mexico, the central plaza of the nation. The rebuilding of the city after the siege of Tenochtitlan was accomplished by the abundant indigenous labor in the surrounding area. Franciscan friar Toribio de Benavente Motolinia , one of

11070-419: The over-extraction of groundwater, called groundwater-related subsidence . Since the beginning of the 20th century the city has sunk as much as nine meters (30 feet) in some areas. On average Mexico City sinks 20 inches (1 foot and 8 inches) or 50 centimetres (1/2 meters ) every year. This sinking is causing problems with runoff and wastewater management, leading to flooding problems, especially during

11193-532: The patterns of periodic inundations of the lake. Several villages appeared on the northeast side of the lake between 1700 and 1250 BC. By 1250 BC the identifying signs of the Tlatilco culture , including more complex settlements and a stratified social structure, are seen around the lake. By roughly 800 BC Cuicuilco had eclipsed the Tlatilco cultural centers and was the major power in the Valley of Mexico during

11316-650: The pine forests of the Desierto de los Leones National Park . Amusement parks include Six Flags México , in Ajusco neighborhood which is the largest in Latin America. There are numerous seasonal fairs present in the city. Mexico City has three zoos. Chapultepec Zoo , the San Juan de Aragon Zoo  [ es ; no ] and Los Coyotes Zoo . Chapultepec Zoo is located in the first section of Chapultepec Park in

11439-516: The political disputes of the country. It was the imperial capital on two occasions (1821–1823 and 1864–1867), and of two federalist states and two centralist states that followed innumerable coups d'états in the space of half a century before the triumph of the Liberals after the Reform War . It was also the objective of one of the two French invasions to Mexico ( 1861–1867 ), and occupied for

11562-568: The population of Mexico City was about 500,000. The city began to grow rapidly westward in the early part of the 20th century and then began to grow upwards in the 1950s, with the Torre Latinoamericana becoming the city's first skyscraper. The rapid development of Mexico City as a center for modernist architecture was most fully manifested in the mid-1950s construction of the Ciudad Universitaria, Mexico City ,

11685-636: The postal abbreviation of the Federal District in Spanish: D.F., which is read "De-Efe"). They are formally called capitalinos (in reference to the city being the capital of the country), but "[p]erhaps because capitalino is the more polite, specific, and correct word, it is almost never utilized". The oldest signs of human occupation in the area of Mexico City are those of the " Peñón woman " and others found in San Bartolo Atepehuacan ( Gustavo A. Madero ). They were believed to correspond to

11808-432: The presidency was set between the P.R.I. 's candidate, Carlos Salinas de Gortari, and a coalition of left-wing parties led by Cuauhtémoc Cárdenas , son of the former president Lázaro Cárdenas . The counting system "fell" because coincidentally the power went out and suddenly, when it returned, the winning candidate was Salinas, even though Cárdenas had the upper hand. As a result of the fraudulent election, Cárdenas became

11931-472: The renovation of vehicles and the modernization of public transportation. The autocratic government that ruled Mexico City since the Revolution was tolerated, mostly because of the continued economic expansion since World War II. This was the case even though this government could not handle the population and pollution problems adequately. Nevertheless, discontent and protests began in the 1960s leading to

12054-593: The right to elect both a head of government and the representatives of the unicameral Legislative Assembly by election in 1997. Ever since, left-wing parties (first the Party of the Democratic Revolution and later the National Regeneration Movement ) have controlled both of them. The city has several progressive policies, such as elective abortions , a limited form of euthanasia , no-fault divorce , same-sex marriage , and legal gender change . On 29 January 2016, it ceased to be

12177-583: The seven pre-imperial kingdoms) was buried under a large mound outside modern-day Xi'an . In the following centuries about a dozen more Han dynasty royal persons were also buried under flat-topped pyramidal earthworks. Numerous giant, granite , temple pyramids were built in South India during the Chola Empire , many of which remain in use. Examples include Brihadisvara Temple at Thanjavur , Brihadisvara Temple at Gangaikonda Cholapuram , and

12300-417: The siege of Tenochtitlan, and during colonial times the Spanish regularly drained the lake to prevent floods. Only a small section of the original lake remains, located outside Mexico City, in the municipality of Atenco , State of Mexico . Architects Teodoro González de León and Alberto Kalach along with a group of Mexican urbanists, engineers and biologists have developed the project plan for Recovering

12423-544: The signing of their new constitution, where the concept of a federal district was adapted from the United States Constitution . Before this designation, Mexico City had served as the seat of government for both the State of Mexico and the nation as a whole. Texcoco de Mora and then Toluca became the capital of the State of Mexico. During the 19th century, Mexico City was the center stage of all

12546-455: The southern highlands of Mexico 's central altiplano . Lake Texcoco formerly extended over a large portion of the southern half of the basin, where it was the largest of an interconnected chain of five major and several smaller lakes (the other main lakes being Lakes Xaltocan, Zumpango , Chalco , and Xochimilco ). Much of the lake was fed from groundwater aquifers; fresh water poured in from Lake Chalco and Xochimilco's freshwater springs, and

12669-418: The stones that were dated might have been recycled from earlier constructions. She claimed that earlier research from the 1930s, confirmed in the 1980s by Fracchia, was ignored. Liritzis responded that Lefkowitz failed to understand and misinterpreted the methodology. The Pyramids of Güímar refer to six rectangular pyramid-shaped, terraced structures, built from lava without mortar . They are located in

12792-462: The summer. The entire lake bed is now paved over and most of the city's remaining forested areas lie in the southern boroughs of Milpa Alta , Tlalpan and Xochimilco . Originally much of the valley lay beneath the waters of Lake Texcoco , a system of interconnected salt and freshwater lakes. The Aztecs built dikes to separate the fresh water used to raise crops in chinampas and to prevent recurrent floods. These dikes were destroyed during

12915-584: The sun in its eternal round. As of 2008, some 135 pyramids had been discovered in Egypt, most located near Cairo. While African pyramids are commonly associated with Egypt, Sudan has 220 extant pyramids, the most in the world. Nubian pyramids were constructed (roughly 240 of them) at three sites in Sudan to serve as tombs for the kings and queens of Napata and Meroë . The pyramids of Kush, also known as Nubian Pyramids , have different characteristics than those of Egypt. The Nubian pyramids had steeper sides than

13038-532: The thermal springs of Zumpango and Xaltocan, as well as some in Texcoco itself, provided saline water. During periods of high water levels—typically after the May-to-October rainy seasons —the lakes were often joined as one body of water, at an average elevation of 2,242 m (7,356 ft) above mean sea level. In the drier winter months the lake system tended to separate into individual bodies of water,

13161-479: The top to represent the god's residence. The structures were laid in groups of five parallel to each other. Because it was built of clay/mud like the Deffufa of Nubia, over time periodic reconstruction has been required. Pausanias (2nd century AD) mentions two buildings resembling pyramids, one, 19 kilometres (12 mi) southwest of a still standing structure at Hellenikon, a common tomb for soldiers who died in

13284-417: The total draining of what was left of Lake Texcoco. After the disappearance of Lake Texcoco, snow has never fallen again over Mexico City. The region of the Valley of Mexico receives anti-cyclonic systems. The weak winds of these systems do not allow for the dispersion, outside the basin, of the air pollutants which are produced by the 50,000 industries and 4 million vehicles operating in and around

13407-541: The viceregal palace on the main square or Zócalo . The Mexico City Metropolitan Cathedral , the seat of the Archbishopric of New Spain, was constructed on another side of the Zócalo, as was the archbishop's palace, and across from it the building housing the city council or ayuntamiento of the city. A late seventeenth-century painting of the Zócalo by Cristóbal de Villalpando depicts the main square, which had been

13530-533: The water. The Aztec ruler Ahuitzotl attempted to build an aqueduct that would take fresh water from the mainland to the lakes surrounding the Tenochtitlan city. The aqueduct failed, and the city suffered a major flood in 1502. During Hernán Cortés 's siege of Tenochtitlan in 1521, the dams were destroyed, and never rebuilt, so flooding became a big problem for the new Mexico City built over Tenochtitlan. Mexico City suffered from periodic floods; in 1604

13653-487: The world until the Lincoln Cathedral was finished in 1311 AD. Its base covers an area of around 53,000 square metres (570,000 sq ft). The Great Pyramid is the only extant one of the Seven Wonders of the Ancient World . Ancient Egyptian pyramids were, in most cases, placed west of the river Nile because the divine pharaoh's soul was meant to join with the sun during its descent before continuing with

13776-462: The world's largest constructions. They are shaped in reference to the sun's rays. Most had a smoothed white limestone surface. Many of the facing stones have fallen or were removed and used for construction in Cairo . The capstone was usually made of limestone, granite or basalt and some were plated with electrum . Ancient Egyptians built pyramids from 2700 BC until around 1700 BC. The first pyramid

13899-468: The year 1325. Around it, the Aztecs created a large artificial island using a system similar to the creation of chinampas . To overcome the problems of drinking water, the Aztecs built a system of dams to separate the salty waters of the lake from the rain water of the effluents . It also permitted them to control the level of the lake. The city also had an inner system of channels that helped to control

14022-423: Was built in the center of the inland lake system, with the city reachable by canoe and by wide causeways to the mainland. The causeways were rebuilt under Spanish rule with indigenous labor. Colonial Spanish cities were constructed on a grid pattern, if no geographical obstacle prevented it. In Mexico City, the Zócalo (main square) was the central place from which the grid was then built outward. The Spanish lived in

14145-458: Was built on top of it circa 3500 BC. Built in receding tiers upon a rectangular, oval, or square platform, the ziggurat was a pyramidal structure with a flat top. Sun-baked bricks made up the core of the ziggurat with facings of fired bricks on the outside. The facings were often glazed in different colors and may have had astrological significance. Kings sometimes had their names engraved on them. The number of tiers ranged from two to seven. It

14268-465: Was described as a Golden age in Aztec chronicles. By the year 1300, however, the Tepanec from Azcapotzalco were beginning to dominate the area. According to a traditional story, the Mexica wandered in the deserts of modern Mexico for 100 years before they came to the thick forests of the place now called the Valley of Mexico. Tenochtitlan was founded on an islet in the western part of the lake in

14391-631: Was erected during the Third Dynasty by the Pharaoh Djoser and his architect Imhotep . This step pyramid consisted of six stacked mastabas . Early kings such as Snefru built pyramids, with subsequent kings adding to the number until the end of the Middle Kingdom . The age of the pyramids reached its zenith at Giza in 2575–2150 BC. The last king to build royal pyramids was Ahmose , with later kings hiding their tombs in

14514-424: Was established, known as México Tenochtitlán , and as of 1585, it was officially known as Ciudad de México (Mexico City). Mexico City played a major role in the Spanish colonial empire as a political, administrative, and financial center. Following independence from Spain , the federal district was established in 1824. After years of demanding greater political autonomy , residents were finally given

14637-503: Was inaugurated by the president of Mexico Andrés Manuel López Obrador on 30 August 2024. The park was designated after the cancelling of an airport in the same location . The lake is home to an endemic species of snake , the Lake Chapala Garter Snake, a currently recognized subspecies of Mexican garter snake (Thamnophis eques). Mexico City This is an accepted version of this page Mexico City

14760-418: Was not political but rather a very conservative Spanish social one, based on proving the worthiness of the family. Most of these families proved their worth by making fortunes in New Spain outside of the city itself, then spending the revenues in the capital, building churches, supporting charities and building extravagant palatial homes. The craze to build the most opulent residence possible reached its height in

14883-554: Was quickly adopted as a city nickname but has faded since the new motto, Capital en Movimiento ("Capital in Movement"), was adopted by the administration headed by Marcelo Ebrard , though the latter is not treated as often as a nickname in media. Up until 2013, it was common to refer to the city by the initialism "DF" from "Distrito Federal de México". Since 2013, the abbreviation "CDMX" (Ciudad de México) has been more common, particularly in relation to government campaigns. The city

15006-566: Was signed in what is now the far north of the city. The capital escaped the worst of the violence of the ten-year conflict of the Mexican Revolution . The most significant episode of this period for the city was the Decena Trágica ("Ten Tragic Days") of February 1913, when forces counter to the elected government of Francisco I. Madero staged a successful coup. The center of the city was subjected to artillery attacks from

15129-403: Was where major celebrations took place as well as executions. It was also the site of two major riots in the seventeenth century, one in 1624, the other in 1692. The city grew as the population did, coming up against the lake's waters. As the depth of the lake water fluctuated, Mexico City was subject to periodic flooding. A major labor draft, the desagüe , compelled thousands of indigenous over

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