Symphony no. 37 in G major, K.444

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 number '37'. 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.