Symphony No. 37 (Mozart)

Michael Haydn, the true author of the Symphony No. 37, once attributed to Mozart

Symphony No. 37 in G Major, (K. 444/425a + Anh A 53) is a work that was once attributed to Wolfgang Amadeus Mozart and given a place in the Köchel catalogue as well as the above number. It is in fact Symphony No. 25 in G major by Michael Haydn, bearing the catalogue numbers P 16 and MH 334. This mistake, long ago corrected, resulted from a brief musical introduction (an adagio maestoso) added by Mozart to Haydn's symphony.