 Unfortunately archaeologists are limited in their knowledge of this site because the Temple of the Sun and many other pyramids at Pachacamac have been irreversibly damaged by looting and the "El Niño" weather phenomenon.The Old Temple, also called the Temple of Pachacamac, is the oldest building in Pachacamac.It is built on a rocky promontory and is characterized by the massive use of small bricks of raw adobe dated to the Early Intermediate period, under the influence of the Lima culture (3rd to 7th centuries AD).