Architecturally it is the most important structure of the site. Inside the Precinct there are four monoliths, two next to the east wall and two next to the west wall, placed symmetrically near the corners.

Monoliths: The monoliths measure 1.40 m to 2.20 m long; 1.15 m to 1.50 m high and 0.70 m to 0.90 m wide and their weight varies from 2.5 to 3 tons. They have the shape of an inverted T, in which the vertical part was used in its four faces to carve the head and the horizontal part, in its front side, to carve the torso and arms of each character.