Symphony No. 39 (Michael Haydn) 41 in C major (also written in 1788). The last movement is a vigorous fugato, something else this work has in common with Mozart's Symphony No. 41 and Haydn's own Symphony No. 28 in C major which Mozart certainly studied. Unlike the "Jupiter" Symphony, in this symphony the fugal theme is at its first instance accompanied by its usual countersubject: Robbins Landon speculates that Mozart also studied Haydn's No. 39 before writing his No. 41, since he "often requested his father Leopold to send him the latest fugue that Haydn had written." (Robbins Landon, 1967) Whether Mozart knew Haydn's later
Symphony No. 37 (Mozart) Symphony No. 37 (Mozart) The so-called Symphony No. 37 in G major, K. 444/425a, is an introduction by Wolfgang Amadeus Mozart to a symphony in G by Michael Haydn. The complete symphony was for a long time believed to be a work by Mozart, but is now known to have actually been mostly written by Michael Haydn, being his Symphony No. 25 in G major, Perger 16, Sherman 25, MH 334. The true authorship was discovered by Lothar Perger in 1907. Modern commentators find it "difficult to comprehend how the editors of the Breitkopf edition of Mozart could have considered