An in depth look at Shostakovich's final work in the genre, No. 15. Composed in summer 1971 and premiered the following January, the Fifteenth is distinctive in its very surprising quotation from Rossini's William Tell Overture, as well as other musical allusions. The composer's mysterious, introspective late style is evident in the second movement, with its long cello solo. Video by Anthony Princiotti.