Final answer:
The area where the Aztec Empire was located 700 years ago is now Mexico City, Mexico. The Aztecs ruled from the capital city of Tenochtitlan and their territory became the Viceroyalty of New Spain.
Step-by-step explanation:
The area where the Aztec Empire was located 700 years ago is now Mexico City, Mexico, which was built on top of the indigenous cultural center of the Aztec world, Tenochtitlan.
The Aztecs ruled from the capital city of Tenochtitlan, a complex civilization that flourished in central Mexico in the 13th century.
The Aztec Empire was conquered by the Spanish in the 16th century, and the Aztec territory became the Viceroyalty of New Spain, which eventually became Mexico City.