Aztec Tenochtitlan. Who, What, When, How, Where, Why?

What is the main type of currency in Tenochtitlan?
Cotton and Cacao beans were the main type of currency in the Aztecs barter and trade system.
Who built it?
The Aztecs a tough group from the valley of Mexico
How did the Aztecs built their city of Tenochtitlan?
The aztecs pressed stakes in to the lake bed to make the ground on the city. The city was weaved with many canals to get around.
When did the Aztecs arrive in Tenochtitlan?
In 1323 the Aztecs were pushed on to the island in the middle of the lake after skinning the daughter of a powerful city-states leader
Why did the Aztecs stay in the middle of a lake to build there empire?
The Aztecs were following a story their main god told them once when he visited them. He told them that one day they would have their own city. They had to wait to find the special place to hold their city, when they saw a eagle perched on a cactus holding a snake in he mouth then they found the spot that their city should be build.
Where was Tenochtitlan build at?
The main city of Tenochtitlan was build in the valley of Mexico on a little island int he middle of Lake Texcoco.