large rectangular blank space above them had marble slabs fixed onto it, with the beginning of the inscription – the drilled holes for these slabs' metal fixings are still visible. The missing part of the inscription probably named the emperor Valerian, father of Gallienus who was captured by the Sassanid Persians in 260. See also List of Roman triumphal arches List of ancient monuments in Rome References Sources Corpus Inscriptiorum Latinarum VI.1106 External links Gallienus