On the course of the wadi are the ruins of the Monastery of Theoctistus, known in Arabic as Deir Muqallik.[7] They are hard to access, being situated quite high on the steep northern bank of the wadi at the spot where the valley deepens, turning into a canyon.[7] According to Byzantine sources, it was established in the 5th century by Euthymius and Theoctistus.[7] Archaeologists confirm that the main phase of the cave church complex and related structures date back to the 5th-7th century, the monastery's 'golden era', with signs of a far less significant habitation period during the Early-Mid Muslim period in the 7th-11th or 12th century.[7] The cave church complex was established at the beginning of the 5th century, and at the end of the 8th the monastery was deserted.[7]