In 1952, she made her London debut at the Royal Opera House in "Norma" with veteran mezzo-soprano Ebe Stignani as Adalgisa, a performance which survives on record and also features the young Joan Sutherland in the small role of Clotilde. Callas and the London public had what she herself called "a love affair", and she returned to the Royal Opera House in 1953, 1957, 1958, 1959, and 1964 to 1965. It was at the Royal Opera House where, on July 5, 1965, Callas ended her stage career in the role of "Tosca", in a production designed and mounted for her by Franco Zeffirelli and featuring her friend and colleague Tito Gobbi.