It was founded by Baldwin I of Jerusalem as an outpost of the larger Montreal Castle, which stands about 34 kilometres (21 mi) north of it at Shoubak.

During their rule, the Crusaders built several castles and forts from Antioch in the north, to Karak, Montreal (Shawbak), and the Petra region to the south.

At Petra, Baldwin I, king of the Latin Kingdom of Jerusalem, built the fortress of Al-Wua'yra to be able to control the area extending southeast of the Dead Sea.

[citation needed] Wu'ayra is a small spur castle on a narrow ridge with smooth sides.

In the northwestern corner of the castle there are the remains of a church built on a single hall system measuring 13 m by 6 m. A room is connected to it from the eastern side.

Wu'ayra Castle is a significant educational asset that gives students and academics the chance to delve into the history and culture of the area.