 Although Willers has done an excellent study of the lower level of the arch, permission was not granted for close study of the upper level, so his statements concerning the upper level are based on previously published measurements and images.A complete investigation of the monument, perhaps with limited excavation of the foundations as Willers suggests, remains to be done.Two inscriptions are carved on the architrave of the arch’s lower level, one centered over the arched opening on either side.