The Aztecs inhabited the area around Lake Texcoco in central Mexico between 1300-1500 CE. They founded the city of Tenochtitlan on an island in the lake, which grew to become one of the largest cities in the world. The Aztecs were known for their large empire, sophisticated culture, and practice of human sacrifice for religious rituals. The Aztec empire came to an end when the Spanish conquistador Hernán Cortés defeated the Aztecs and captured Tenochtitlan in 1521.