Ballet in one act with choreography by Balanchine, libretto and music by Vittorio Rieti (after Bellini), and designs by Dorothea Tanning. Premiered 27 Feb. 1946 by the Ballet Russe de Monte Carlo at City Center in New York with Danilova, Magallanes, Maria Tallchief, and Michel Katcharoff. A 19th-century gothic romance, the ballet revolves around a poet and a sleepwalker who meet during a masked ball. Their encounter leads to jealous intrigue and the poet's eventual murder. Some of the music is taken from Bellini's opera of the same name but the plot is entirely different. The ballet was revived many times, with stagings for Grand Ballet du Marquis de Cuevas (1948), Royal Danish Ballet (1955), New York City Ballet (1960), Ballet Rambert (1961), London Festival Ballet (1967), and American Ballet Theatre (1981). One of Balanchine's few narrative ballets.