Madain Saleh (Al-Hijr) dates back to the Nabataean Civilization considered as one of the very important archaeological site in Saudi Arabia called “The Capital of the Monuments” as it contains huge amount of diverse and multifaceted monuments. Because of the proper climate and natural conditions in adaptation to the availability of fresh water in the area, people settled there. The Kingdom of Nabataean with its capital Petra in Jordan expanded to dominate Madain Saleh, which reach during that period, the peak of civility and civilization. They innovated in carving stones, drilling wells in the rocks, digging rainwater tanks and carving places of worship in the rocks. Studies shows that Madain Saleh governed by the Nabataean, then by the Romanians who dominated the north Arabian Peninsula in 106 AD.