(b. Mannheim, May 15, 1763 ; d. Carlsruhe, Apr. 13, 1826), composer and violoncellist, studied chiefly under his father, first violoncellist to the Elector Palatine, and in composition under the Abbe Vogler. At 15 he was admitted into the Elector's band. In 1778 the band was transferred to Munich, and there Danzi produced his first opera, 1 Die Mittemachtsstunde,' which was followed by ' Der Kuss,' ' Cleopatra,' ' Iphigenia ' and others. In 1790 he married Marguerite Marci iand (d. Munich, 1799), a distinguished singer, and in the following year started with her on a professional tour which lasted six years. At Prague and Leipzig he conducted the performances by Guardassoni's Italian company, and his wife was especially successful in the parts of Susanna in ' Le Nozze di Figaro,' and Caroline and Nina in ' II matrinionio segreto.' They were also favourably received in Italy, especially at Venice and Florence. In 1797 they returned to Munich, where Mme. Danzi died. Her husband soon after resigned his post of vice-Kapellmeister to the Elector, to which he was appointed in 1798. In 1807 he was appointed Kapellmeister to the King of Wiirtemberg ; then Kapellmeister a t Carlsruhe, where he remained till his death. He composed eleven operas, besides a mass of orchestral, chamber and church music. (See Q.-L.) His 1 Singing Exercises ' were used for long after his death and form his most permanent work. His daughter was Mmc. L ebrun (q.v.). m. c. c.