The Aztec capital of Tenochtitlan became the Spanish capital Mexico City, which was and remains the most populous city in Mexico.
From 1521, the Spanish conquest of the Aztec empire incorporated the region into the Spanish empire, with New Spain its colonial era name and Mexico City the center of colonial rule. It was built on the ruins of the Aztec capital of Tenochtitlan and became the capital of New Spain. During the colonial era, Mexico's long-established Mesoamerican civilizations mixed with European culture. Perhaps nothing better represents this hybrid background than Mexico's languages: the country is both the most populous Spanish-speaking country in the world and home to the largest number of Native American language speakers in North America. For three centuries Mexico was part of the Spanish Empire, whose legacy is a country with a Spanish-speaking, Catholic and largely Western culture.