Humayma, ancient Hawara, was the only significant settlement in the Hisma, the desert between Petra and Aqaba. Founded by a Nabataean king in the late first century B.C., the site flourished for 750 years as a Nabataean, Roman, Byzantine, and Early Islamic settlement. In 25 years of survey and excavation, the author has recovered unique architectural and artifactual remains of all these cultures. In this final report volume, the first of four, he presents the topography and ecology of the region, the history of the site, and a detailed examination of the integrated water-supply system that made the settlement possible. A long synthetic chapter evaluates this system in the context of the water-supply technology of the ancient Near East. This book will be of interest to both students and scholars concerned with ancient hydraulic technology, the Nabataeans, the Romans in the Near East, early Byzantine culture, and the origins of the Abbasid family.