The Abgarids were a Nabatean dynasty who reigned between 134 and 242 CE over the city of Edessa and the northern Mesopotamian region of Osrhoene, first a buffer state between Rome and the Parthians and later a vassal state of Rome (Ramelli, 1999). Recent research (see Ramelli, 2004) has demonstrated that the Abgarid monarchy endured in Edessa still for some decades after Caracalla, contrary to what was assumed earlier on the basis of the Chronicle of Pseudo-…