This topographical map of Mexico City and its surroundings dates from around 1550, some three decades after the conquest of the Aztec capital of Tenochtitlán by Hernán Cortés in 1521. Tenochtitlán was founded in the 14th century on an island in the salt lake of Texcoco. Upon occupying the city, the Spanish pulled down its central parts and replaced the Aztec temples with buildings constructed in the Spanish style, but they left the street layout virtually intact. The map shows the new buildings. The cathedral (Iglesia Major) is in the ...