For 10 points, name this composer of a seven movement fourteenth string quartet in C-sharp minor as well as the "Rasumovsky" quartets.
He reworked his Wind Octet in E-flat major into his first string quintet, while his third string quintet was a reworking of his Opus 1 C Minor Piano Trio. The death of Eleanore von Pasquiati prompted a work set for string quartet and four voices, the "Elegischer Gesang," and he gave unusual prominence to the clarinet in his (*) Septet in E-flat major. The poems of Aloys Jeittelles inspired his song cycle An die ferne Geliebte, and his piano trios include an eleventh called the "Kakadu variations" and a seventh called "Archduke." For 10 points, name this composer of a seven movement fourteenth string quartet in C-sharp minor as well as the "Rasumovsky" quartets.
He reworked his Wind Octet in E-flat major into his first string quintet, while his third string quintet was a reworking of his Opus 1 C Minor Piano Trio.
Ludwig van {Beethoven}