German man of letters, born at Hanover; studied theology at first, but turned to literature and began with poetry; settled in Jena, and in 1798 became professor of Fine Arts there; was associated in literary work with Madame de Staël for 14 years; delivered "Lectures on Dramatic Art and Literature" at Vienna in 1708, and finished with a professorship of Literature at Bonn, having previously distinguished himself by translations into German of Shakespeare, Dante, &c.; he devoted himself to the study of Sanskrit when at Bonn, where he had Heine for pupil (1767-1845).