The monastery is surrounded by a keep, which was built in the 5th century to protect the monastery against the attacks by Berbers.

1.0 The monastery is surrounded by a keep, which was built in the 5th century to protect the monastery against the attacks by Berbers. Tom Carroll Photography https://www.tomcarrollphotography.com/ photo 1440 960 https://www.tomcarrollphotography.com/img/s/v-10/p1311824243-6.jpg