Christianity was the first world religion to be adopted in Eritrea and the oldest monastery in the country Debre Sina (monastery) was built during the 4th century. It is one of the oldest monasteries in Africa and the world. Debre Libanos, the second oldest monastery, was said to have been founded in the late fifth or early sixth century. Originally located in the village of Ham, it was moved to an inaccessible location on the edge of a cliff below the Ham plateau. Its church contains the Golden Gospel, a metal-covered bible dating to the 13th century during which Debre Libanos was an important seat of religious power.