<Table> <Tr> <Td> Aztec Empire </Td> <Td> </Td> </Tr> </Table> <Tr> <Td> Aztec Empire </Td> <Td> </Td> </Tr> <P> Tenochtitlan (Spanish: Tenochtitlan, Spanish pronunciation: (ˈmexiko tenotʃˈtitlan) (listen)), originally known as México - Tenochtitlan (Classical Nahuatl: Mēxihco - Tenōchtitlan (meːˈʃíʔ. ko te. noːt͡ʃ. ˈtí. t͡ɬan)), was a large Mexica city - state on an island in Lake Texcoco in the Valley of Mexico . Founded on June 20, 1325, it was the capital of the expanding Aztec Empire in the 15th century until it was captured by the Spanish in 1521 . </P> <P> At its peak, it was the largest city in the Pre-Columbian Americas . It subsequently became a cabecera of the Viceroyalty of New Spain . Today, the ruins of Tenochtitlan are in the historic center of Mexico City . </P>

What was the capital city of the aztec empire