Built in the 16th century by the Spanish on the ruins of Tenochtitlan, the old Aztec capital, Mexico City is now one of the world's largest and most densely populated cities. It has five Aztec temples ...

They provided the Aztec capital and other major city-states with luxury items and exotic goods from faraway lands. They also kept tabs on their neighbors and communities in other lands.

The bar was originally discovered in 1981 during a construction project in Mexico City, which was built on the ruins of the Aztec capital Tenochtitlan A new scientific analysis of a large gold bar ...