The western platform of Structure B1-1 supports a superstructure, which has been called the Temple of the Columns. Because of the westward orientation of all the structures at Tazumal, the Temple of the Columns standing on the west side of the main pyramid may have served as its main facade. This structure had square columns and two identically sized chambers, separated by a space with two columns. The northern chamber had an entrance on the east side, with a possible additional entrance on the south side.