Carl Maria Friedrich Ernst von Weber (c. 18 November 1786 – 5 June 1826) was a German composer, conductor, virtuoso pianist, guitarist, and critic of the early Romantic period. Best known for his operas, he was a crucial figure in the development of German Romantische Oper (German Romantic opera). Throughout his youth, his father, Franz Anton, relentlessly moved the family between Hamburg, Salzburg, Freiberg, Augsburg and Vienna.
https://en.wikipedia.org/wiki/Carl_Maria_von_Weber