Ar-Raḥba

Al-Rahba guards the Euphrates valley near Mayadin, where the cultivated riverbank meets the Syrian desert. The first town, founded by the Abbasid commander Malik ibn Tawk, stood beside the river. After an earthquake devastated it in 1157, a new fortress rose on a mound towards the desert, protected by walls and overlooking the approaches to the valley. Its position made it a coveted stronghold on the road between Syria and Iraq.

Under the Mamluks, al-Rahba was an important frontier fortress and administrative centre on the Euphrates, as well as an eastern terminus of the sultanate's postal network. Its garrison stood on a contested frontier with the Mongol powers of Iraq. The fortress and its settlement remained significant through the later Middle Ages, though their importance diminished under Ottoman rule. The high citadel preserved the memory of the town that had once guarded this passage between the river and the desert.