The Lordship of Oultrejordain or Oultrejourdain was the name used during the Crusades for an extensive and partly undefined region to the east of the Jordan River, an area known in ancient times as Edom and Moab. It was also referred to as Transjordan.

Montreal, or Qal'at ash-Shawbak in Arabic, is a castle built by the Crusaders and expanded by the Mamluks, on the eastern side of the Arabah Valley, perched on the side of a rocky, conical mountain, looking out over fruit orchards below. The ruins are located next to the modern town of Shoubak in Jordan.