Since the end of the 8^th c. it has become the Bishop’s court.  In 906 the Pogos Petros cathedral, in 1067 the Sb.  Astvatsatsin tomb-church, in 1295 the Sb. Gregory church and in 1787 Grigor Tatevatsi tomb were built. In the end of the 20^th c. other construction and rehabilitation works were done in the surroundings of the monastery. At present the monastery is fully restored and serves as a center of Syuniats diocese. In 1390-1435 the famous Vardapetaran (University) of Tatev and the schools of miniature painting and writing existed in Tatev monastery.

The monastery had a large matenadaran, where about 10 thousand hand-written books were kept. 264 villages of 10 provinces were paying taxes to the monastery.