The String Quartet No. 15 in G major, D. 887, was the last quartet written by Franz Schubert in June 1826. It was posthumously published in 1851, as Op. 161. The work focuses on lyrical ideas and explores far-reaching major and minor modes, which was uncommon to this degree in his compositions. Schubert reinforced this with a range of dynamic contrast and use of texture and pizzicato. The structural form of the movements in this quartet are somewhat ambiguous due to Schubert's focus on lyricism rather than traditional harmonic structure.