The Ancient Pyramid Builders were a group of civilizations that lived in Central America and Mexico. The Mayas, Aztecs, and Mayans were three of the most prominent civilizations that built pyramids. The Mayas were known for their advanced mathematics and astronomy, while the Aztecs were known for their powerful empire and their human sacrifices. The Mayans were known for their hieroglyphic writing system and their calendar. All of these civilizations had a shared belief in the importance of pyramids as a symbol of power and strength.