an ancient, populous, and handsome town of Italy, in Romagna, which is part of the territory of the church, with a bishop's see, an old castle, and a strong tower; as also many remains of antiquity, and very fine buildings. It is famous for a council in 1359, consisting of 450 bishops, who were all Arians except 25. It is seated in a fertile plain, at the mouth of the river Marecchia, on the gulf of Venice. P. Long. 12. 39. N. Lat. 44° 6'.