The al-Jawf oasis lies at the northern extremity of the Kingdom of Saudi Arabia and although closer to ‘Ammān than to al-Riyāḍ, it is nevertheless reckoned by some to be a part of geographical Najd. Within the oasis is the settlement known as al-Jawf or Jawf 'Amīr, which is the ancient town of Dūmat al-Jandal, famous in early Islamic history. In the district, the town of al-Jawf is still referred to by the local people as Dūmat al-Jandal. Dūmat al-Jandal is no longer the main town of the area, having declined when Sakāka to the north-east became the seat of the amīrate. Today much of Dūmat al-Jandal appears to be deserted and the houses ruined, although it was clearly formerly a large settlement whose extensive farms and gardens are still cultivated (Plate I). The whole al-Jawf oasis and Wādī Sirḥān to the north are rich in pre-Islamic monuments and inscriptions which have been documented to some extent and standing on the acropolis of Dūmat al-Jandal is the largest of all these monuments, Qaṣr al-Mārid, dated to the 3rd century A.D., but with later additions (Plate II).