All columns once supported a frieze and a roof which have since collapsed. The exact nature of the roof is not certainly known. It may have been made of mortar, wood or thatch.
It is believed that these were great meeting halls. Remains of the painted frieze indicate that it was decorated with motifs and Chaac masks representing an earlier priestly class who governed the city.
And the addition of warriors on the pillars must have made the citizens aware of the military religious aspect of this site.
This vast space has a quadrangular floor plan. It is surrounded by several important structures including the Mercado (marketplace), the Temple of the Warriors and some structures still to be reconstructed.