The name of this region originally derives from the city Oea, which was founded by the Phoenician and it formed the center of the region along with Leptis Magna and Sabratha. Oea was later renamed by the Arabian conquerors as Tripolis. This territory spans 1000 kilometers west and south along the coast. By the massif Djebel Nafusa, where the clouds release their moisture as rain, a prosperous agriculture was enabled, which also explains the establishment of this area.