On two occasions, Felix Mendelssohn composed music for William Shakespeare's play A Midsummer Night's Dream (in German Ein Sommernachtstraum). First in 1826, near the start of his career, he wrote a concert overture (Op. 21). Later, in 1842, five years before his death, he wrote incidental music (Op. 61) for a production of the play, into which he incorporated the existing overture. The incidental... Wikipedia