The stone used for construction at Dainzú is mainly from river cobbles formed from volcanic rock such as basalt. All building construction was adjusted to the site topography. Only three structures have been explored thus far:
Building A Located in the highest part of the site, apparently had religious purposes. Its construction is staggered, four platforms built with stones and clay, building four platforms, most interesting are the bas-reliefs decorating the bottom of the south wall of the lower body, called sculpture gallery, every stone contains figures with motion, there are not two the same and complete in varied positions. According to Ignacio Bernal hypothesis, these represent ballgame players whose position reveals movement, probably were placed during a reconstruction of the platform, reason there does not seem to be any arrangement. The structure is a large platform built against the west-facing hillside and has about 35 bas-reliefs carved into the southern side of its lower wall. Most of these represent ball-players, Interspersed among the representations of ballplayers are a small number of bas-reliefs depicting priests making offerings, these stones are incised with
calendrical dates and may represent specific rituals related to the ballgame. It is the oldest terrace, constructive characteristics have similarities with J building at
Monte Albán. Comprises three terraces superimposed on the hill, is connected with building B by means of a stuccoed patio. It has two facades (north and south) with a large stairway in the center. The upper terrace is the highest and is formed by an almost vertical wall of more than 5 meters high with rounded corners, access was through a roofed stepped indoor passage. During investigations, four rooms were found, roof made by large stones placed at an angle, as in some of the Monte Albán tombs. The lower terrace forms a 1.25 meter vertical wall. Entrance is by a stairway system recessed in the wall, at the southwest corner. On the north side the relief is different from the rest. The terrace has a central stairway. During the different construction stages, changes were made, for example the addition of rooms, stairways and walls, with the essential aim of repairing building damages and prepare for new and other uses. At the hill summit of this building, is a large number of natural rocks protruding from the vegetation and representing severed heads, probably related to ball players.
Bas-Reliefs Gallery These representations are unique in
Mesoamerica the bas-reliefs portray religious dignitaries as well as ball players holding a small ball in a hand. The site features a gallery of carved stone bas-reliefs similar in style to the
danzante bas-reliefs at
Monte Albán. Further bas-reliefs are carved into the
living rock of the hilltop shrine. The presence of skulls may be an indication of the symbolism associated with the game. ==Bas-Relief Interpretation ==