Monastery of Martyrius built
401 CE.
Shown on the map at 31.779°, 35.300°.
Monastery of Martyrius, whose ruins, known as Khirbet el-Murassas in Arabic, have been excavated in the centre of the West Bank settlement and city of Ma'ale Adumim, was one of the most important centres of monastic life in the Judean Desert during the Byzantine period. It was active between the second half of the 5th and the mid-7th century.
Text from the Wikipedia article Monastery of Martyrius, licensed CC BY-SA 4.0.