The Gustav Mahler Museum is a Hamburg museum dedicated to the composer and conductor Gustav Mahler. Founded in 2018, it is one of the six museums in the so-called KomponistenQuartier, a union of six museums along the Peterstraße, dedicated to famous composers who have spent parts of their lives in Hamburg. Mahler worked from 1891 to 1897 in Hamburg as an opera director. The museum houses several objects related to the composer's memory, such as a pianist made by Welte-Mignon, who faithfully reproduces the composition in the way Mahler intended to play it. Reproductions of billboards on an advertising column testify to the success of his concerts.