The palace also houses the Museum of Musical Instruments, boasting an impressive collection whose original pieces were string instruments built by the violin maker Leandro Bisiach between 1903 and 1915, which the count commissioned. These pieces continue to be an important part of the museum thanks to their uniqueness.
The museum also has an exceptional harpsichord built in 1515 by Vincentius – the oldest existing instrument of its kind in the world – a cello by Antonio Stradivari, a violin and cello by Nicola Amati, a violin by Mattia Albani and a violin by Cammilli.
In addition to the museum, the Chigiana Academy conserves historic instruments, including a Bechstein piano that belonged to Liszt and two organs, the larger of which is on display in the gallery of the Concert Hall.