The Church of St. Peter the Old was built in the 10th or 11th century. It is attached to the apse of the Early Christian Church of St. Andrew. The Church of St. Peter the Old is mentioned in 918 in the testament of Prior Andrew. The building itself is still existing, but seems not to be used as Church anymore.
Its a single nave edifice with two aisles - making it unique building and rather hard to be classified.
It has three phases of development: the first is dated in the 6th century and its a single nave edifice dedicated to St. Andrew; later a rectangular edifice was added to this building on its Eastern side and its called St. Peter the Old and in the later phase this building has been remodeled as a building two aisles and two apses. Today the entire edifice is called Church of St. Peter the Old.