The Brahms Collection No other well-known composer's estate has survived as complete as Johannes Brahms's did until the middle of the 20th century.
Sheet music archive The sheet music collection comprises around 200,000 works from the early modern period. It ranges from extensive opera scores — especially from the 18th century — to short album sheets comprising just a few bars.
Musical instruments The collection of musical instruments comprises over 800 inventory numbers, although it should be noted that instrument parts or violin bows, for example, are often also regarded as individual "musical instruments".
Collection of letters The collection comprises around 10,000 letters and various non-musical autographs. Highlights include the well-known letters of great composers such as Wolfgang Amadeus Mozart, Ludwig van Beethoven, and Joseph Haydn.
Picture and graphics collection The picture and graphics collection of the Gesellschaft der Musikfreunde in Wien consist of more than 50.000 graphics, paintings, photos, busts and medals.
Beethoven’s Eroica The most famous hole in music history can be found in Beethoven's Third Symphony score in E flat major op. 55, the Eroica. This score is one of the most prominent objects in the archives of the Gesellschaft der Musikfreunde. Yet it is not even an autograph.
Mozart's Symphony No. 40 The 40th Symphony in G minor, K. 550, is arguably Wolfgang Amadeus Mozart's most popular work. The composer's original score is now housed in the archives of the Society of Friends of Music, and it has a very special history.
