Sedvu Saint Nshan, Medieval monastery in Kachachkut, Armenia

Sedvu Saint Nshan is a 13th-century monastery in Sedvu gorge, 3 km south of Kachachkut. Its main church, 8.8 by 7.0 m, is a single-nave hall with a barrel vault on three pairs of pilasters; a square vaulted hall with an eight-sided roof stands before the south entrance, and a small chapel adjoins the north wall. The walls are of bluish basalt.

The church of Saint Nshan was built in the 13th century, and the adjoining chapel was added later against its north wall, with its only door opening into the church. The complex also kept a square vaulted hall before the south entrance, dwellings and farm buildings to the south-east, and an irregular blue basalt wall with two arched gates and semicircular corner towers, of which only traces remain.

The monastery is not an active parish: the church stands roofless and unused, and the site is protected by the state's service for historical and cultural reserves and museums. Its name, Saint Nshan, refers to the Holy Sign, and the surrounding Sedvu gorge holds old village sites, medieval cemeteries and many cross-stones (khachkars) that visitors can see.

The monastery lies in Sedvu gorge, 3 km south of Kachachkut village, close to the Akori–Kachachkut road. The church, chapel and surviving outbuildings stand in the open with no visitor facilities; the site is looked after by the state service for protected historical and cultural reserves. The ruins of Sedvu fortress (Sedva ghala) lie about half a kilometre away at a spot called Ghuli Ghash.

About half a kilometre from the monastery, at a spot called Ghuli Ghash, stood Sedvu fortress (Sedva ghala); only traces remain, but a three-storey tower-like structure survives, each floor a square room with its own entrance from outside.