The Musical Offering (German Musikalisches Opfer or Das Musikalische Opfer) is a collection of keyboard canons and fugues and other pieces of music by Johann Sebastian Bach, all based on a single musical theme given to him by Frederick the Great (Frederick II of Prussia), to whom they are dedicated. The Ricercar a 6, a six-voice fugue which is the highpoint of the entire work, was put forward by the musicologist Charles Rosen as the most significant piano composition in history. This ricercar is also occasionally called the Prussian Fugue, a name used by Bach himself. The composition features in the opening section of Douglas Hofstadter's Pulitzer Prize winning book Gödel, Escher, Bach. * Manufacturer BA5155 * Volume 2: Trio Sonata * Violin, Basso continuo, Flute * Urtext / Critical Edition