Constantiana Daphne

Daphne was a Byzantine fortification inaugurated, most probably in 327, on the left bank of the Danube, across Transmarisca, in the delta of the Arges river. In 367, emperor Valens crossed the Danube at Daphne using a pontoon bridge. It was mentioned by Ammianus Marcellinus and Procopius of Caesarea.

The most probable position is at Gradistea at south west of Ulmeni. Still some historians believe that the Daphne was the new name of the Sucidava- Celei.