Its span is a barrel vault, constituting an extension in width of a round arch. The facade is simple with a round arch for the entrance. Its inner section consists of two pillars of convex cubic form supporting a round arch. It has eight, round arch windows. Outsize stone figures on horseback decorate the palace entrance with its round arch. The round arch is used throughout the church. The south porch has a wide outer entrance with moulded round arch and moulded imposts. In the bottom stage is a west doorway with a round arch of two orders. The round arch is a fundamental of Byzantine style. It features a central projecting section with a deep, three-story-high round arch recess. The crest extended hindwards and down, forming a round arch at the highest point. It has a round arch and is constructed of rock-faced stone. The cathedral's interior features round arch windows and pilasters with Corinthian capitals. A round arch in the entrance gable end is its prominent decorative feature. They support a round arch with side pendentives decorated by chamfered pilasters and tondo reliefs.