The manuscripts, pictures, musical instruments and mementos displayed in the Museum's exhibitions form the core of the Beethoven-Haus collection. In the early years following the foundation of the Beethoven-Haus Society in 1889, important items such as Beethoven's last pianoforte (an instrument made by the Viennese piano manufacturer Conrad Graf), or the original manuscript of the "Moonlight Sonata" and the "Pastoral" Symphony were acquired. Today it is the largest and most diverse Beethoven collection in the world. It includes manuscripts, letters, pictures, busts, coins and medallions, musical instruments, furniture and everyday items used by Beethoven.
The collection is kept in a safe, built with conservation requirements in mind, which is under the stage in the Chamber Music Hall. Many performers feel particularly inspired by this architectural symbolism.
The Beethoven Collection in the Digital Archive is available to everyone. There are also catalogues for additional research.