The main city of the Aztecs was

Tenochtitlán.

Tenochtitlan, which is now known as Mexico City. Here are the steps to provide more information about the main city of the Aztecs:

1. The Aztecs were an indigenous civilization that thrived in present-day Mexico from the 14th to the 16th century.
2. Their capital city, Tenochtitlan, was founded in 1325.
3. Tenochtitlan was located on an island in Lake Texcoco in the Valley of Mexico.
4. The city was a highly organized and developed urban center, with numerous canals, causeways, and floating gardens known as chinampas.
5. The Aztecs built impressive structures within Tenochtitlan, including temples, palaces, markets, and ceremonial plazas.
6. One of the most iconic structures in the city was the Templo Mayor, a large pyramid dedicated to the Aztec gods.
7. Tenochtitlan served as the political, economic, and religious center of the Aztec empire.
8. The city was characterized by its bustling markets, where people from different regions would gather to trade.
9. The Aztecs had an advanced system of governance, with an emperor at the top of the hierarchy.
10. Unfortunately, Tenochtitlan was conquered by Spanish conquistadors led by Hernán Cortés in 1521, marking the end of the Aztec civilization.

The main city of the Aztecs was Tenochtitlan.

To find the answer to this question, you can either:

1. Conduct a simple web search: Use a search engine like Google and type in "main city of the Aztecs." The search results should include information about Tenochtitlan.

2. Consult a history book or encyclopedia: Look for reputable history resources that cover the Aztec civilization. You can check the index or table of contents for information about the Aztec main city.

3. Reach out to a historian or expert: If you have access to historians or experts in Aztec history, you can ask them directly. They will likely have the knowledge and expertise to provide you with the information you seek.