Mendelssohn (1809~1847) Portrait of Mendelssohn by the English miniaturist James Warren Childe (1778–1862), 1839 String Quintet No. 1, in A major, Op. 18= The String Quintet No. 1 in A major, Op. 18, was composed by Felix Mendelssohn in 1826 and revised in 1832. The piece is scored for two violins, two violas and cello. Like all of Mendelssohn's string quartets, this work has four movements: All..