Castra Sucidava - Credit: Wikimedia Commons
Sucidava (Sykibid, Skedevà after Procopius of Caesarea,Olga Karagiorgou Σucidava after Vasile Pârvan, where Σ is pronounced "sh"Pârvan - știri din Dacia Malvensis http://www.cimec.ro/Arheologie/ParvanArticole/ParvanStiriNouaDinDaciaMalvensis.pdf)) is a Dacian and Daco-Roman historical site, situated in Corabia, Romania, on the north bank of the Danube. The first Christian Basilica established in Romania can be found there and the foot of a Roman bridge over the Danube built by Constantine the Great to link Sucidava with Oescus (today in Bulgaria, in Moesia), in order to start the reconquest of Dacia. There is also a secret underground fountain which flows under the walls of the town to a water spring situated outside. Read more on Wikipedia
Source: en.wikipedia.org