Mesoamerican pyramids, pyramid-shaped structures, are an important part of ancient Mesoamerican architecture. Although similar in shape, these structures bear only a very weak architectural resemblance to Egyptian pyramids. These structures were usually step pyramids with temples on top – more akin to the ziggurats of Mesopotamia than to the pyramids of Ancient Egypt. The Mesoamerican region's largest pyramid by volume – indeed, the largest in the world by volume – is the Great Pyramid of Cholula, in the Mexican state  of Puebla. Some classic Mesoamerican pyramids are littered with stories about the Hero Twins, the feathered serpent Quetzalcoatl, creation, ritualistic sacrifice, etc. written in the form of hieroglyphs on the rises of the steps of the pyramids, the walls, and the sculptures contained within.