 The portico and the cella stand on a podium built by a system of parallel vaults surrounded by a corridor, both accessible by two separate staircases from the cella.Two more staircases lead to the roof of the temple, a flat terrace probably used by the worshippers for rituals.The interior of the cella was cladded with polychrome marbles, as proven by the clamps' holes in the walls and fragments of verde antico slabs from the floor.