Petite symphonie concertante, Op. 54, is an orchestral composition by the Swiss composer Frank Martin, one of his best-known works. Martin received the commission for the work in 1944, though progress was delayed by work on the oratorio In Terra Pax. The Petite symphonie concertante was completed the following year and received its premiere in Zurich on May 27, 1946, under the direction of Paul Sacher, who is also the work's dedicatee. Sacher's commission prompted Martin to assume the unusual ensemble of harp, harpsichord, piano and string orchestra divided into two groups, though all accounts suggest the final choice of instruments was the composer's own. Using all of the common stringed instruments available, Martin desired to use the harp, harpsichord and piano not as accompanying, or '