The Aztec Empire lasted from the 14th to the 16th century. With their capital of Tenochtitlan, the Aztecs settled in present-day Mexico. The Aztecs spoke the language of Náhuatl. The parts of the Aztec culture consisted of human sacrifices and the belief of mythical creatures. To add to this, the Aztecs had an extremely accurate calendar which consisted of 365 days. They also had a religious calendar which was made up of 260 days.