noun, plural agencies. 1. an organization, company, or bureau that provides some service for another: a welfare agency. 2. a company having a franchise to represent another. 3. a governmental bureau, or an office that represents it.
Causeways and Canals. Early on in the history of the city the Aztecs built causeways and canals for transportation to and from the city. A causeway is a raised road that allowed the people to easily travel over the swampy and wet areas. There were three major causeways that led from the island city to the mainland.
The Aztecs. The Aztecs were a people who came into the Valley of Mexico in the 12th century and quickly rose to become the dominant power in Mesoamerica. The capital of the Aztecs, Tenochtitlan, was built on Lake Texcoco on raised islands.