 Three triangular niches behind the altar provide openings for light.The sole of the altar has carved geometrical ornament, alternating with rosettes in places.The church of Surp Nshan (, "Holy Sign of Cross" in Armenian), situated south of the church of Grigor, is a small cross-winged domed structure built, judging by the type of the building and by architectural details, in the 11th century, probably soon after the church of S. Grigor.