Carnival at La Fenice Opera House with La traviata, Barbiere di Siviglia, Il campiello and Grand Cavalchina Ball. The Gran Ballo della Cavalchina is considered as the most exclusive and spectacular of the many masked balls and carnival related events that occur during the Carnival of Venice, Italy. Held annually, at the world renowned Teatro La Fenice or La Fenice theatre, for one night the elegant grand ballroom is transformed into a masquerade ball. The evenings program also boasts a wide array of staged performances by period costumed clowns, acrobats and live musicians.