The dimensions of the north church are small: the "naos" is long and wide, and was sized according to the population living in the monastery at that time. The masonry of the northern church was erected by alternating courses of bricks and small rough stone blocks. In this technique, which is typical of the Byzantine architecture of the 10th century, the bricks sink in a thick bed of mortar. The building is topped by an Ottoman dome pierced by eight windows.