The main church is small, it has just one nave with hexagonal side apses. In front of the entrance, a tiled canopy is built on a timber construction. It is borne by two marble pillars, fragments of structures from the pre-Christian period (5th. century B.C.). At the top, the shafts end in Corinthian capitals. Apparently there was an ancient Greek temple in the area in which the Church of the Archangel was later erected.