Aliobrix
Reni Urban Hromada, Ukraine
Aliobrix was a Roman fortification west of modern-day Orlivka, Ukraine. It served as the complementary fortress of Noviodunum ad Istrum on the opposite bank of the Danube, and was part of the broader Moesian Limes. The remains from Roman and other periods in the area form the multilayered Cartal (Kartal) archaeological complex.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).