The size and quality of the monuments, the originality of the residential architecture and the miraculous iconography in the coloured murals of the buildings or the vases with the paintings of butterflies, eagles, coyotes with feathers and jaguars, suggest beyond of any doubt a high-level civilization, whose cultural influences were spread and transplanted into all the Mesoamerican populations. The main monuments of the city of Teotihuacan are connected to each other by a central road of 45 meters wide and a length of 2 kilometres, called "Avenue of the Dead " (Avenida de los Muertos), because it is believed to have been paved with tombs. East is the imposing "Pyramid of the Sun " (Piramide del Sol), the third largest pyramid in the world. It has a volume of 1 million cubic meters. It is a gradual pyramid, with a base dimensions of 219.4 x 231.6 meters and a height of 65 meters. At the top of the pyramid there was a huge pedestal, where human sacrifices were made.