The temple for Trajan and Zeus Philios rose on the highest point of the castle hill. On a terrace prepared with vaulted structures, the temple rose in the middle on a 2.90 meter high podium. The temple itself was a peripteros of Corinthian order about 18 meters wide with 6 × 9 columns and two column positions between the ante. In the north, the area was closed off by an elevated columned hall, while the east and west side were only limited by simple ashlar walls, but were replaced by columned halls in the Hadrianic era.
During the excavations, fragments of statues of Trajan and Hadrian, especially the portrait heads, and fragments of the cult statue of Zeus Philios were found in the rubble of the cella.
Source: Wikipedia