Tenochtitlán: The City on the Lake
The Aztecs built their capital Tenochtitlan on a swampy island in Lake Texcoco using innovative engineering including Chinampas (floating garden islands), massive causeways connecting the island to the mainland, flood-control dikes, and a twin-pipe aqueduct for fresh water, as covered in Pengi Social Studies Grade 7, Chapter 8: Civilizations of the Americas. This level of urban planning rivaled ancient Rome and supported one of the largest cities in the world.
Key Concepts
The Aztecs were master engineers who built their capital, Tenochtitlán , on a swampy island in the middle of Lake Texcoco . Because land was scarce, they expanded the island by building Chinampas , or "floating gardens." These were artificial islands made of woven reed mats piled with mud, which provided extremely fertile land for growing crops to feed the massive city.
To connect the island to the mainland, the Aztecs constructed massive Causeways (raised earthen roads). They also built a complex system of dikes to prevent flooding and separate salty water from fresh water. A twin pipe Aqueduct brought fresh spring water from the hills into the city center, demonstrating a level of urban planning comparable to ancient Rome.
Common Questions
Where was Tenochtitlan located?
Tenochtitlan was built on a swampy island in the middle of Lake Texcoco in central Mexico, a location the Aztecs chose based on a religious prophecy about an eagle on a cactus eating a snake.
What were Chinampas?
Chinampas were artificial islands created by the Aztecs from woven reed mats piled with mud, nicknamed floating gardens; they were extremely fertile and provided food for the growing city population.
How did Tenochtitlan manage fresh water?
A twin-pipe aqueduct brought fresh spring water from the surrounding hills into the city center; having two pipes meant one could be cleaned while the other kept supplying water.
How was Tenochtitlan connected to the mainland?
Massive causeways (raised earthen roads) connected the island capital to the mainland, and a system of dikes prevented flooding while separating salty lake water from fresh water.
How large was Tenochtitlan?
At its height, Tenochtitlan had a population of roughly 200,000-300,000 people, making it one of the largest cities in the world and larger than most European cities of the same era.