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Petra fortress was located on the rocky hillside of the sea, beside the wall it is guarded by a rocky terrain (Greek name "Petra" means rock). Petra was considered as an inaccessible fortress, its ruins are still preserved.
The archaeological complex includes the Citadel, outside of town and settlement. The ruins of the palace, antique baths, farmhouses and soldiers' residences, as well as the basilica of the VI-VII century, which is the remains of the Episcopal Cathedral of Peter, remain in the citadel.
The city had a narrow seaside road connecting western Georgia with the Byzantine provinces, Iran and Armenia. Petra controlled the sea sailing from Byzantium to the eastern Black Sea coast. Byzantium and Iran were interested in keeping Petra in their favor, as their political and economic expansion depended on Peter's control of the region. That was one of the reasons for the great war of Egris in the middle of the VI century. There were several important battles near Petra during the war.