MEXICA - not Aztecs
(pronounced "me-shee-ka") History of the Mexica, (Aztecs is a startlingly imprecise term to describe the culture that dominated the Valley of Mexico in the fifteenth and sixteenth centuries.)
The Aztecs, or more properly, the Mexicas, for whom the later Republic of Mexico was named, were a Mesoamerican people of central Mexico in the 14th, 15th and 16th centuries. They were a civilization with a rich mythology and cultural heritage. Their capital was Tenochtitlan, built on raised islets in Lake Texcoco – the site of modern-day Mexico City. The Aztec empire produced the biggest demographic explosion in Mesoamerica: the population grew from an estimated 10 million to 15 million.
Mexica (Aztec) Calendar converter