Introduction Hamwi said it in the glossary of countries in relation to the so-called fortress built Dome bin Ismail. The Jandal: it rocks, and finished: Jendlp. And this would mean: the fort, which was built in the Dome filled with stones. He set an example immune Fort Domat and intensity. Geographical Domat Al-Jandal is located south west of the town of Skaka in Saudi Arabia on the rocks belong to the Arabian Shield, one of the most important areas of geological Kingdom, and from the town of Skaka 40 kilometers. And where the attack occurred Domat Al-Jandal in the life of the Prophet, and several years after the battle of Dumat al-Jandal, in the era of Abu Bakr al-Siddiq. History Dumat al-Jandal, date back to the seventh and eighth centuries of pre-birth as mentioned in Assyrian sources Odomatu or on behalf of Adamu, Domat Al-Jandal and includes many historical sites such as the famous fortress and the remains of the giant wall of Dumat al-Jandal and the site of the arbitration between Ali ibn Abi Talib and the emergence and after Maawiya Islam, the Muslims invaded Dumat al-Jandal Hijri Year 5. In the modern era of Dumat al-Jandal is located north of Saudi Arabia. Other relics found in Domat Al-Jandal (giant castle [1] and Omar bin al-Khattab mosque, [2]).