ODERBERG  , a

town of Germany, in the Prussian province of Brandenburg, on the Alte Oder, 2 M. from Bralitz, a station 44 M . N.W. from Frankfort-on-Oder, by the railway to Angermunde . Pop . (1905) 4,015 . It has a fine Gothic church, dedicated to St Nicholas, and the ruins of an ancient castle, called Barenkasten . Oderherg is an important emporium for the Russian timber trade . ODESCALCHI-ERBA, the name of a Roman princely family of great antiquity . They are supposed to be descended from Enrico Erba, imperial vicar in Milan in 1165 . Alessandro Erba married Lucrezia Odescalchi, sister of Pope Innocent IX., in 1709, who is believed to have been descended from Giorgio Odescalchi (/loruil at Como in 1290) . The title of prince of the Holy Roman Empire was conferred on Alessandro in 1714, and that of duke of Syrmium in Hungary in 1714, with the qualification of " serene highness." The head of the family now bears the titles of Furst Odescalchi, duke of Syrmium, prince of Bassano, &c., and he is an hereditary magnate of Hungary and a grandee of Spain; the family, which is one of the most important in Italy, owns the Palazzo Odescalchi in Rome, the magnificent castle of Bracciano, besides large estates in Italy and Hungary . See A. von Reument, Geschichte der Stadt Rom (Berlin, 1868), and the Almanach de Gotha .