the right point west. To the sides are stylized wings in red, green and ochre. One of the most important discoveries between 1932 and 1936 was the Altar of the Sculpted Skulls, which was officially reported by archeologist Eduardo Noguera in 1937. This building is located in one of the lower levels of the northeast patio area, attached to the base of the Pyramid of the Painted Skulls. The architectural aspects of this altar, however, correspond to the Post classic period. The altar sits on a platform and faces east, in front of which are stairs to climb the platform. For this reason, it is considered a momeztli type of altar, which are placed on ceremonial platforms. It has a square base with its north, south, and west sides done in talud that rise up to a decorated section that is topped with a cornice. The access stairs have parallel beams that culminate in dados – an element found in Tenayuca and other Mexica areas. The name comes from the three human skulls made from clay, with bulging eyes and covered in stucco, along with the rest of the structure. This ornamental feature relates to the function of the altar, which is believed to be a mausoleum. It contains the remains of a man and woman. The female skeleton is accompanied by grave goods related to domestic life such as comals, bone needles, spindles, and pots. The male skeleton probably belonged to a renowned warrior. His grave goods are far richer, with ritual vessels, and elegant vase with a multicolored design, obsidian arrowheads, and a musical instrument called an omexicahuaztli. A jawbone of a xoloitzcuintle dog was also found. Pre-Hispanic people considered dogs guides to the underworld. The function of this mausoleum was mostly likely to perpetuate the memory of the male warrior. It has two levels. One is a pyramidal platform and the other is a talud-tablero structure with a double cornice and crest in adobe, decorated with interlocked designs in low relief painted red, yellow and green. The talud is painted black as well as the bottom part of the tablero, with some minor details in ochre. The north side only shows the jaw and eye of a skull and some of the arrow and other effects seen on the pyramid it is associated with. The west side contains two skulls. One conserves about half of the original