Numerous ceramic fragments and coins from the 1st-3rd centuries discovered here confirm the existence of an earlier Roman fort at "Bisericuta" but its site has not been identified.After the abandonment of the Dacian province by the Romans, its strategic position in the north-western corner of Dobrudja gave the fort an important role in the frontier defensive system.[citation needed] The fort had been inhabited until the end of the 6th or the beginning of the 7th century when, in the context of Phokas's rebellion, the entire lines of Lower Danube had collapsed under the pressure of Slav tribes.The fort was rebuilt and became the siege of a Byzantine garrison after the successful campaigns of the emperor Ioannes Tzimiskes (969–976) against the Kievian Russians, when Dobruja was again incorporated to the Empire.Buildings on the Dinogetia Site: From the Later Roman Empire are bricks stamped with the mark of Legio I Iovia (Scythica) and the presence of Gothic federates.