The Olmec were the first civilization in Mesoamerica, located along the Gulf of Mexico coast. They built large cities and were centers of religion, carving colossal stone heads to represent rulers or gods. Mesoamerica was home to three major pre-Columbian civilizations - the Maya, Aztecs, and Incas. The Maya flourished from 300-900 CE in modern Guatemala and Honduras, building immense city-states centered around pyramids topped with shrines. They had advanced achievements in astronomy, mathematics, and a complex writing system. The Aztecs rose to power in central Mexico from 1400-1520 CE, establishing the island city of Tenochtitlan,