Mexico City is the capital city of Mexico. It is the economic, industrial, and cultural center in the country, and the most populous city, with about 8,836,045 inhabitants in 2008.
Greater Mexico City incorporates 59 adjacent municipalities of Mexico State and 29 municipalities of the state of Hidalgo, according to the most recent definition agreed upon by the federal and state governments.
Mexico City is also the Federal District. The Federal District is coterminous with Mexico City; both are governed by a single institution and are constitutionally considered to be the same entity.
Mexico City is located in the Valley of Mexico, also called the Valley of Anáhuac, a large valley in the high plateaus at the center of Mexico, at an altitude of 2,240 meters (7,349 ft).
The city was originally built as Tenochtitlan by the Aztecs in 1325 on an island of Lake Texcoco. It was almost completely destroyed in the siege of 1521, and was subsequently redesigned and rebuilt in accordance with the Spanish urban standards. In 1524 the municipality of Mexico City was established, known as México Tenustitlán, and as of 1585 it is officially known as ciudad de México.
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