Church of St Sophia or the Old Bishopric
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The Old Mitropolia is a three-naved unvaulted basilica with a total length of 19 m and a width of 13 m. The division into three naves was effected by two rows of five pillars each. The middle nave (9.3 m wide) ends to the east with a big closed apse, round outside and three-sided inside. Built in the 4th-5th century and rebuilt, it functioned as a church throughout the Middle Ages. It has mixed masonry: stone and brick. It is the largest of the Nesebar churches whose overground structure has survived.

