Mexico City is founded on the ruins of Tenochtitlan. Tenochtitlan, the capital of the Aztec Empire, was founded by the Aztec or Mexica people around 1325 C.E. The city was laid out symmetrically, with four sectors separated by four causeways or canals surrounding the central area. This central area was where the temple of Huitzilopochtli, temples for other gods, and the rulers’ palaces lay. The Spanish conquistadors, aided by an alliance of Indigenous peoples, laid siege to the Aztec capital for 93 days, until the Mexica surrendered on August 13, 1521. A great deal of Tenochtitlan was destroyed in the fighting or was looted, burned, or destroyed after the surrender. The leader of the conquistadors, Hernan Cortés, began the construction of what is now known as Mexico City among the ruins. Lake Texcoco was ultimately drained, and much of Mexico City rests in the lake basin.

Source: National Geographic