String Quintet, Op. 29 in C major composed by Ludwig van Beethoven was first published in 1801. This work is a "viola quintet" in that it is scored for string quartet and an extra viola (two violins, two violas and cello). With the String Quintet, Op. 4 being an extensively re-worked arrangement of the earlier Octet for Winds, Op. 103, the Op. 104 quintet an arrangement of an earlier piano trio, and the later fugue a fragmentary work, this work is the only full-scale, original composition of Beethoven's in the string quintet genre.