To the north of the first cruciform platform is a rectangular structure facjng the south. The? remains of eight sandstone pillars were the foundation of the base of the pavilion. The pavilion has a long narrow gallery? and a antechamber with doorways and step to the northern, western, and eastern side.The building used to be called ?White Elephant House?? but is now know as the ?changing pavilion? because it is believed to have been used by kings and royal family members for changing attire before the performing rituals.