The String Quartet No. 4 in E minor, Op. 44, No. 2, was composed by Felix Mendelssohn in 1837, and revised in 1839.
This work was premièred on 29 October 1837 at Leipzig with great success, and published as full score in 1840. The piece is part of the Op. 44 set of 3 string quartets that Mendelssohn dedicated to the Crown Prince of Sweden. While Mendelssohn's first and second quartet was written under the influence of Beethoven, Op.44 exhibits clear sprouting of composer's originality in style.