Oescus
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Oescus was an ancient town in Moesia, northwest of the modern Bulgarian city of Pleven, near the village of Gigen. It is a Daco-Moesian toponym. Ptolemy calls it a Triballian town, but it later became Roman. It was linked by a bridge over Danube with ancient city Sucidava (modern day Corabia - Romania) by Constantin the Great.