Teotihuacan Pyramids
It was named the "City of the Gods" as deep religious convictions and ways of life were centred on the natural cycles and seasons of sowing, reaping and rainfall. Astronomical and calendrical expression was reflected in the construction of the city. Teotihuacan's ceremonial centre is laid out in symbolic representation of two axes; the north-south axis is named the Avenue of the Dead from which, parallel to the wings of a butterfly, buildings, palaces, plazas and altars extend to either side. At one end stands the Pyramid of the Moon and off to one side, rising in an immense stone mass, looms the Pyramid of the Sun; two massive structures representing the duality of creation between nature and the men who built these walls with volcanic rock, limestone, and song.