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 (1838–45); Universal Church Dictionary (1846–50); History of the Visigoths (1827); History of the Omayyads in Spain (1829); History of Vienna University (1865–88). He died in Vienna on the 25th of April 1882.