Cover of a Royal Opera House souvenir programme, signed by Maria Callas, Charlie Chaplin and Tito Gobbi. The program comes from a performance of Tosca on Feburary 5, 1964, where Callas starred as Tosca opposite Gobbi's Scarpia, and which Chaplin evidently attended as an audience member. A few smudges to Chaplin's signature, light creasing, left edge rough. Overall fine. 7.25 x 6.75 inches (17.5 x 18.5 cm).