The Eastern Ceremonial CenterThe Eastern Ceremonial Center is to the east of Western Ceremonial Center, and separated by a deep gully, which was originally filled with houses and other structures. This has been mapped, but only one excavation has taken place there. In the 1950s Stanley Boggs excavated a platform on the southwest edge of this ceremonial center and discovered a burial perhaps a human sacrifice of a woman who had been buried with a dog and a set of miniature vessels. The Eastern Ceremonial Center has the remains of a large number of high platforms and at least one palace.
The southern extension of the Eastern Ceremonial Center, which is not walled, contains a pyramid as large as P-7 and a large number of long platforms, smaller "pyramids," and other structures, including elite housing.