Brief Description:
Built in the 16th century by the Spanish upon the ruins of Tenochtitlan, the old Aztec capital, the city is today one of the largest and most densely populated cities of the world. Besides the five Aztec temples, there is also the cathedral, and 19th- and 20th- century public edifices such as the Palacio de las Bellas Artes

Source: UNESCO World Heritage Committee