The decoration of the elongated north and south walls includes brick blind arches in the bottom part and a large arch for each wall adjacent to the dome with a columned window in the middle.[2] There are windows above the lower arches of the north and south facade. The dome, which also exhibits a large number of ornamental details and ceramics, features eight windows, one for each of its sides. The medieval frescoes which were painted on the interior walls of the church have been only fragmentarily preserved.[3]