The excavated room consists of a central room, on either side of which there is a smaller, narrower room; they are of the same size (probably first cent. A.D.). One of these rooms was changed into a Mithraeum later on. The sanctuary is rectangular (H. 4.42 L. 11.83 Br. 6.25) and is divided into a central aisle (Br. 1.95) and two side-benches, sloping towards the walls. Along the front of the r. bench (H. 0.83 Br. 1.