The most remarkable architectural feature of the building is the partition that separated the altar from this long gallery; it consists of two columns between antae, with capitals of a very peculiar form, consisting of the fore parts of bulls set back to back; from these the whole building is sometimes called the sanctuary of the bulls.
There are still standing nine columns of the south side and two of the north of the peristyle, and one of the antae and an inner column of the pronaos.
Wood was also used for all the columns, doorposts, and antae (rrapacrTetScs), and in some cases the walls of the rooms were lined with wood, carefully fixed by dowels, the holes for which still exist.
On a parapet at the rear of each chamber a single slender Ionic column between two antae supported an Ionic entablature.
In it were carved out four chambers or reservoirs all connected and a porch consisting of three pillars between two antae in which the side walls ended.