Symphony No. 40 in G minor, K. 550 was written by Wolfgang Amadeus Mozart in 1788. It is sometimes referred to as the "Great G minor symphony", to distinguish it from the "Little G minor symphony", No. 25. The two are the only extant minor key symphonies Mozart wrote.
The Köchel catalogue is a chronological catalogue of compositions by Wolfgang Amadeus Mozart, originally created by Ludwig Ritter von Köchel, in which the entries are abbreviated K., or KV. The numbers of the Köchel catalogue reflect the continuing establishment of a complete chronology of Mozart's works, and provide a shorthand reference to the compositions.
The Symphony No. 37 in G major, K. 444/425a+Anh.A 53, is a symphony misattributed to Wolfgang Amadeus Mozart. It is the P 16, MH 334 - Symphony No. 25 in G major by Michael Haydn with an Adagio maestoso composed and added by Mozart as an introduction. Mozart's added introduction led to the misattribution of the entire symphony being his original work.
The Adagio and Fugue in C minor, K. 546, is a composition by Wolfgang Amadeus Mozart for strings. Mozart entered it into his own work catalogue on 26 June 1788 in Vienna as "A short Adagio for two violins, viola and bass, for a fugue which I wrote some time ago for two Pianos". The fugue in question was the two piano fugue in C minor, K. 426, written in December 1783.
Symphony No. 6 in F major, K. 43, was composed by Wolfgang Amadeus Mozart in 1767. According to Alfred Einstein in his 1937 revision of the Köchel catalogue, the symphony was probably begun in Vienna and completed in Olomouc, a Moravian city to which the Mozart family fled to escape a Viennese smallpox epidemic; see Mozart and smallpox.
Symphony No. 7 in D major, K. 45, by Wolfgang Amadeus Mozart, was completed in Vienna in January 1768 after the family's return from a visit to Olomouc and Brno in Moravia. The symphony is in four movements. Its first performance was probably at a private concert. The symphony was reworked to become the overture to Mozart's opera, La finta semplice, K. 51, composed and performed later that year, and the overture itself was subsequently adapted further to create a new symphony, known in the Köchel 1964 (K6) catalogue as K. 46a. The autograph of the score is preserved in the Staatsbibliothek Preusischer Kulturbesitz in Berlin.
This list of Mozart symphonies of spurious or doubtful authenticity contains 39 symphonic works whose initial attribution to Wolfgang Amadeus Mozart has subsequently been proved spurious, or is the subject of continuing doubt. The number of symphonies actually written by Mozart is imprecisely known; of the 41 formally numbered, three are established as by other composers and another, No. 11, is considered by scholars to be of uncertain authenticity. Outside the accepted sequence 1–41, however, there are around twenty other genuine Mozart symphonies, and beyond these, a larger number of problematic works which have not been authenticated as Mozart's. Some of these may be genuine; dubious works are often treated as authentic by the compilers of collected editions—eight are in the main body of the 1991 Neue Mozart-Ausgabe, and another two are included in the supplementary 2000 volume of works of doubtful authenticity. Some, however, have long been accepted as the works of other composers, who in many instances have been positively identified.
The Missa brevis in G major, K. 140, K3 Anh. 235d, K6 Anh. C 1.12, was probably composed by Wolfgang Amadeus Mozart shortly after returning to Salzburg, in March 1773, from his third trip to Italy.
The Symphony in G major "Old Lambach", K. Anh. 221/45a, was probably written by Wolfgang Amadeus Mozart during 1766 in The Hague and revised in 1767. Both versions – the original and the revision – have survived.
The Symphony in F major "No. 43", K. 76/42a, was probably written by Wolfgang Amadeus Mozart.
The Symphony in D major "No. 50", K. 161/141a, was composed by Wolfgang Amadeus Mozart in 1772. The first two movements are from the overture to the opera Il sogno di Scipione, K. 126, and the last movement, K. 163, was composed separately. Köchel gave the entire work the number K. 161.
The Symphony in B♭ major "No. 55", K. Anh. 214/45b, was probably written by Wolfgang Amadeus Mozart in early 1768 in Salzburg.
The Symphony in C major "No. 46", K. 96/111b, was probably written by Wolfgang Amadeus Mozart in 1771 in Milan.
The Symphony in D major "No. 45", K. 95/73n, was probably written by Wolfgang Amadeus Mozart in 1770 in Rome.
The Symphony in D major "No. 47", K. 97/73m, was probably written by Wolfgang Amadeus Mozart in 1770 in Rome.
The Symphony in D major "No. 44", K. 81/73l, may have been written by Wolfgang Amadeus Mozart in 1770 in Rome, although it has sometimes also been attributed to his father Leopold Mozart.
The Symphony in B♭ major "No. 54", K. Anh. 216/74g/Anh.C 11.03, may have been written by Wolfgang Amadeus Mozart in 1771, in Salzburg.
The Symphony in A minor "Odense", K. Anh. 220/16a, was formerly attributed to Wolfgang Amadeus Mozart. If the Odense Symphony had truly been Mozart's, it would be among only three of Mozart's symphonies to be written in a minor key. It is now considered certain that the symphony is not by Mozart.
The lost Symphony in C major, K. Anh. 222/19b, was probably written by Wolfgang Amadeus Mozart in early 1765 in London. It is one of the twelve symphonies that Ludwig von Köchel only knew by its incipit in the Breitkopf & Härtel manuscript catalogue, which listed it as one of six symphonies (Nos. 65–70) sourced from Luigi Gatti (1740–1817), Court Kapellmeister in Salzburg from around 1782:
