From the purandra mantapa walking towards the east one can find two huge vertical pillers with one more fixed horizontally on them. It looks like a frame work of a huge door.
This is known as the royal balance used on main festivals. It is said that the king used ti sit on one side and precious stones jems amd gold was filled on the other side. And all these was given away in charity to the poor people. How ever there is no evidence to support this belief.