Among the master's most exalted compositions, these selections include String Quartets No. 12 in E-flat, Op. 127; No. 13 in B-flat, Op. 130; No. 14 in C-sharp Minor, Op. 131; No. 15 in A Minor, Op. 132; the Grosse Fuge in B-flat, Op. 133; and No. 16 in F, Op. 135.