Marcianopolis

Marcianopolis was a major Roman city at modern Devnya, Bulgaria, originally a Thracian settlement called Parthenopolis. Emperor Trajan renamed it in 106 AD after his sister Ulpia Marciana. Covering over 70 hectares, it served as capital of Moesia Inferior and later Moesia Secunda under Diocletian. The site features a Roman amphitheater, villa urbana, and bishop's basilica, along with renowned Late Roman and Early Byzantine floor mosaics now displayed in Devnya's Museum of Roman Mosaics. Conquered by Attila's Huns in 447 AD, it was finally destroyed by Avars and Slavs in 614-615 AD.