The German pianist-conductor Christian Zacharias returns to the BSO in his dual role for Mozart's Piano Concerto No. 17 in G, performing from the keyboard as Mozart would have done for most of his concerto premieres during his Vienna years. This concerto, one of the composer's most joyous, may have been written for and premiered (in June 1784) by his student Barbara Ployer. Music by Mozart's Viennese successor Franz Schubert opens and closes the program. Schubert's familiar music for the 1823 play Rosamunde has had a successful life in the concert hall, although the play itself was a failure and has long since been lost. Completing the program is one of Schubert's most popular works, the haunting, two-movement Unfinished Symphony in B minor.