The Piano Sonata No. 11 in A major, K. 331 / 300i, by Wolfgang Amadeus Mozart, is a piano sonata in three movements. All of the movements are in the key of A major or A minor; therefore, the work is homotonal. A typical performance of this entire sonata takes about 20 minutes. The last movement marked Alla Turca, popularly known as the “Turkish Rondo” or “Turkish March,” is often heard on its own and is one of Mozart’s best-known piano pieces.