With the present volume of Provincia Arabia, the presentation of our own research work is complete. It initially contains the description of the five Hauran cities Bosra, 'Atil, es-Suweda, el-Kanawat, and es-Suhba, and extends beyond the northern border of the province to the large Roman fort of ed-Dumer, which, although located in Syria, can be regarded in some respects as the northernmost point of the Arabian limes. A seven-day stay in the ancient capital of the province provided me with the opportunity to thoroughly examine the significant ruins and to document various structures in detail; in particular, I was able to measure the magnificent, still fairly well-preserved theater in all its essential parts, although the suspicions of the Turkish occupation, despite the initially friendly disposition of the commander, hindered the completion of the work.