From the same time period the two large (3 m high) panels decorating the attic on the east and west sides of the arch show scenes from Trajan's Dacian Wars. Together with the two reliefs on the inside of the central archway, these came from a large frieze celebrating the Dacian victory. The original place of this frieze was either the Forum of Trajan, or the barracks of the emperor's horse guard on the Caelius.
