north-south along the western facade of the pyramid and a platform of similar length runs east-west along the north side of the structure. These two side platforms were originally built as separate structures but were later incorporated into the Great Platform; it is presumed by investigators that the temple was radially symmetrical and that further platforms existed on the east and south sides. The remains of a platform measuring were found in roughly the correct position for such a platform on the east side. A test pit sunk into the presumed area of the southern platform uncovered an offering containing a cylindrical ceramic vessel with a polychrome bowl placed upon it like a lid. Within the vessel were two larger pieces of jade and 50 smaller jade fragments, a fragment of seashell and a fragment of snail shell, various pieces of animal bone, mica and traces of red pigment. The offering was covered with a slab of stone. The cylindrical vessel was decorated with two panels, each containing a personage wearing a headdress and performing autosacrifice. Structure B1-1 is believed to have developed from a central temple and platforms on each side in the cardinal directions, with the west platforms serving as the main approach. As the complex developed, the space between the platforms was filled to form the Great Platform, the earliest version of which measured . The main pyramid B1-1 was then built upon the Great Platform, behind the western platform and covering the original central temple. The Great Platform was remodelled at least three times before it reached its final dimensions. Temple of the Columns 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. Structure B1-2 Structure B1-2 dates to the Late Classic. It is located to the southwest of the main pyramid B1-1. It is a west-facing pyramid with three stepped levels standing upon a low basal platform. It was built using the talud-tablero style of architecture; the pyramid