The "south church" is a square room surmounted by a dome, and surrounded by two "deambulatoria", an "esonarthex" and a "parekklesion" (added later). The north deambulatorium is the south parekklesion of the north church. This multiplication of spaces around the central part of the church is typical of the late Palaiologian architecture: the reason of that was the need for more space for tombs, monuments erected to benefactors of the church, etc. The central room is divided from the aisles by a triple arcade. During the mass the believers were confined in the deambulatoria, which were shallow and dark, and could barely see what happened in the central part of the church.