Donald Walbridge Shirley (January 29, 1927 – April 6, 2013) was an American classical and jazz pianist and composer. He recorded many albums for Cadence Records during the 1950s and 1960s, experimenting with jazz with a classical influence. He wrote organ symphonies, piano concerti, a cello concerto, three string quartets, a one-act opera, works for organ, piano and violin, a symphonic tone poem based on the 1939 novel "Finnegans Wake" by James Joyce, and a set of "Variations" on the 1858 opera "Orpheus in the Underworld".