Adhruḥ (Udhruḥ in much modern scholarship) is a small town in southern Jordan, about fifteen kilometres east of Petra. Ptolemy included an Adrou (Αδρου) among the towns of Arabia Petraea, and Arab geographers confirm that it was a principal town of the surrounding Sharāt region (Le Strange, 35, 39, 384). It was the location of a large Roman fort, the remains of which still stand. Ḥamza al-Iṣfahānī (d. 350-60/961-71) suggested that this fort was built by the Ghassānids (Ḥamza, 117), although the existence of a Latin