Having been granted unprecedented authority by Louis XIV, the Sun King, no one could stage operas in France without Jean-Baptiste Lully's permission. By 1686, however, Lully's authority was waning and his long-standing librettist deserted him to write sacred works. Despite these setbacks, Lully wrote Acis et Galatée, a pastorale héroïque, and one of his final masterpieces. It's plot - the cyclops Poliphème's love for the nymph Galatée - drew from Lully an astonishing alternation of effects, a profound monologue for the nymph in Act III and a magnificent concluding Passacaille, all framed by a succession of dances and vividly conceived choruses.