to see its open mouth and white teeth. The figure is outlined in ochre and black. The other skull contains only traces of these colors. The lower cornice on the north side is divided by horizontal bands, black above and red below. The interior cornice has double bands of green and red. To the extreme west of the painting, there are skull designs. Building C or the Pyramid of the Nine Stories Building C or the Pyramid of the Nine Stories, was built over Building B between 350 and 450 AD, and is bigger by volume than the Pyramid of the Moon at Teotihuacan. This latter phase was a radial pyramid, with stairways climbing all four sides of the structure. The Pyramid of the Nine Stories was built over the oldest structure using adobe again for expansion to a pyramid with a base of 190 meters squared and a height of 34 meters. Instead of a surface of earth and lime, this pyramid was finished with rock and stucco, which is more durable. Its architectural style is distinct from the one before. It consists of nine stories with talud only, covered in stucco. Each story above is smaller than below, leaving a space of two meters. The entrance stairs were those on the southeast corner, with those on the other three serving as exits. These walls were painted black with the stucco serving as white. Associated with the Stepped Pyramid is the Jaguar Altar, which is located on the southeast corner. The west and south sides of the altar's two levels have been explored. There is evidence that this altar was covered in decoration. On the west side of the first level, there is evidence of black, red, green and ochre paint. On the lower part of the south wall, there are fragments of red, black and ochre. Above this, there is a well conserved section of 3.15 m by 53 cm, with a black and green background with red stripes. There are also the profiles of a jaguar and two serpents. (chapter 4 135) The final phase covered Building C, burying it within its adobe core. The facing of this phase has collapsed to give the impression of a natural hill. Other elements Marquina's first publication about the site in 1939 notes the existence of a Northeast Plaza, which was an unusual find at the time. This plaza contains