Lorenzo Perosi (1872–1956) is reputed to have composed more than 3,000 sacred works, many of them still unpublished, making him the 20th century’s most prolific composer in the genre. Chamber music may consequently appear to be a marginal part of his output, but this impression is misleading, in terms of both quantity and quality. He enriched Italian music with 21 string quartets, 4 piano quintets and numerous string trios, not to mention works for smaller ensembles and solo instruments. Having only recently come to the attention of musicologists, these works remain little-known and rarely performed.