building works were instigated at the Buthrotum including an aqueduct bringing water for fountains, and bath houses creating a lovely city core with a large forum, gymnasium and theaters, along with villas and palaces. By the 5th century AD, Christianity was established in Butrint, and large basilicas and structures were built or created within previously built structures.
Butrint passed through rule under the Slavs, Byzantines, and Angevins. Following a period of prosperity under Byzantine administration, then a brief occupation by the Venetians, the ancient city of Butrint was abandoned in the late Middle ages, when marshes covered the whole area. In 1386, the Venetian Republic purchased the area from the Angevin Kings and held control of Butrint and the island of Corfu just across the straits until the fall of the Venetian Empire in the late 1700’s.