German historian, born at Höchst, Nassau, on the 29th of April 1801; became professor of history in the University at Bonn in 1842, and in Vienna in 1853, retiring in 1872. Among his works are the following: History of the Emperor Sigismund (183845); Universal Church Dictionary (184650); History of the Visigoths (1827); History of the Omayyads in Spain (1829); History of Vienna University (186588). He died in Vienna on the 25th of April 1882.