Debre Damo (Tigrinya: ደብረ ዳሞ) is the name of a flat-topped mountain, or amba, and a 6th-century monastery in Tigray, Ethiopia. The mountain is a steeply rising plateau of trapezoidal shape, about 1000 by 400 m in dimension. … Tradition claims the monastery was founded in the 6th century by Abuna Aregawi.