It is the oldest part of the fort and has a blend of south and north Indian architectural styles. Within the rectangular structure is a shrine with no pillared pavilions (mandapa) and a South Indian barrel-vaulted roof on top. It has a masonry tower in the North Indian Nagari architectural style with a barrel vaulted roof in height. The niches in the outer walls once housed statues but now have chandrashalas (horseshoe arches) ventilator openings in the north Indian style. The chandrashala has been compared to the trefoil, a honeycomb design with a series of receding pointed arches within an arch. The entrance door has a torana or archway with sculpted images of river goddesses, romantic couples, foliation decoration and a Garuda. The vertical bands on either side of the door are decorated in a simple fashion with figures that are now badly damaged. Above the door are a small grouping of discs representing the finial (damalaka) of a Shikhara. The temple was originally dedicated to Vishnu, destroyed during a Muslim invasion, restored into a Shiva temple by installing a linga while keeping the Vaishnava motifs such as the Garuda . It was refurbished between 1881 and 1883.