is a town of Italy, in the territory of Venice, and capital of the Polefin di Rovigo, in E. Long. 12° 25'. N. Lat. 45° 6'. It is a small place, poorly inhabited, and encompassed with ruinous walls. Formerly it belonged to the duke of Ferrara, but has been subject to the Venetians since 1500, and is famous for being the birth-place of that learned man Caelius Rhodoginus. It was built upon the ruins of Adria, anciently a noble harbour one mile from Rovigo, that gave name to the gulph, but now a half-drowned village, inhabited by a few fishermen.