Aztecs in Mexico

Aztec is a term used to refer to certain ethnic groups of central Mexico, particularly those groups who spoke the Nahuatl language and who achieved political and military dominance over large parts of Mesoamerica in the 14th, 15th and 16th centuries, a period referred to as the Late post-Classic period in Mesoamerican chronology.
Often the term "Aztec" refers exclusively to the people of Tenochtitlan, situated on an island in Lake Texcoco, who called themselves Mexica Tenochca or Colhua-Mexica.
Sometimes it also includes the inhabitants of Tenochtitlan's two principal allied city-states, the Acolhuas of Texcoco and the Tepanecs of Tlacopan, who together with the Mexica formed the Aztec Triple Alliance which has also become known as the "Aztec Empire". In other contexts it may refer to all the various city states and their peoples, who shared large parts of their ethnic history as well as many important cultural traits with the Mexica, Acolhua and Tepanecs, and who like them, also spoke the Nahuatl language. In this meaning it is possible to talk about an Aztec civilization including all the particular cultural patterns common for the Nahuatl speaking peoples of the late postclassic period in Mesoamerica.

Historical of Mexico city

Mexico in Spanish pronounced "Me-hee-co" City was founded as Mexico-Tenochtitlan on March 18, 1325 by the Nahua Aztec or Mexican tribe, which rapidly became the capital of a sophisticated growing empire. Located on a small island on the middle of Lake Texcoco, the layout of the city forced the Aztecs to build an artificial island with a series of canals to allow the growth of the metropolis. A number of causeways were also constructed from the shoreline to the central island.These causeways are the foundation of the various calzadas which are today principal avenues in Mexico City. In fact, although the lake was salty, dams built by the Aztecs kept the city surrounded by clear water from the rivers that fed the lake. Two double aqueducts provided the city with fresh water; this was intended mainly for cleaning and washing.
After centuries of pre-Columbian civilization, the Spanish conquistador Hernán Cortés first arrived in the area in 1519. He did not succeed in conquering the city until August 13, 1521, after a 79-day siege that destroyed most of the old Aztec city.
In 1524 the rebuilt city served as the capital of the viceroyalty of New Spain and the political and cultural center of Mexico. The importance of the city was such that the Captaincy General of Guatemala, Yucatán, Cuba, Florida, and the Philippines were administered from it. This colonial period culminated with the construction of the baroque Metropolitan Cathedral and the Basilica of Guadalupe.