Sucidava (Sykibid, Skedevà after Procopius of Caesarea,[2] Σucidava after Vasile Pârvan, where Σ is pronounced "sh"[3]) was a Dacian and Daco-Roman city situated in Corabia, Romania, on the north bank of the Danube.

It developed from the 270s AD and especially after the construction of Constantine's Bridge the northern side of which it protected.

The archaeological evidence shows that in 443–447 the city and the fort were sacked by the Huns, and were restored under Justin I 518–527 or Justinian I 527–565.

There is also a secret underground fountain which flows under the walls of the town to a water spring situated outside.

The coins found at Sucidava show an uninterrupted series from Aurelian (270–275) to Theodosius II (408–450).