In or out of the pit, La Scala's storied house ensemble is a concert orchestra on par with the world's best—and they are led here by the able hand of maestro Chailly in his Festival de Granada debut inside one of the gems of Renaissance architecture. They take on the final symphonies by two Russian greats: Prokofiev's Seventh, imbued with bittersweet nostalgia; and Tchaikovsky's Sixth (the "Pathétique"), premiered just six days before the composer's death, an enduring monument to the extraordinary emotional depths he was capable of expressing in music.