The church of Agia Sofia on Karpathos: The site of the ancient city of Arkesia, now known as Arkassa, presents the ruins of a Christian Basilica belonging to the 5th -6th century A.D. This Christian basilica has been identified to be Agia Sofia and the place is now referred to as the ruins of Agia Sofia. The church of Agia Sofia consists of three large basilicas built one over another and separated by mosaic floors marking the site clearly. The church is assumed to be an early Byzantine creation and is a much-cherished possession for its magnificent and attractive architecture.