Kammala jumla mai zuwa: A ƙarshen shekarun 1950s Varviso ya yi baƙo da yawa ko sanannun baƙo na farko, ciki har da Deutsche Oper Berlin (1958), Paris Opera (1958), da San Francisco Opera (1959), na ƙarshe shine aikinsa na farko a Amurka. A cikin 1958 ya jagoranci farkon duniya na Heinrich Sutermeister "" a
Bikin Baje kolin Duniya na Brussels. A ranar 10 ga Oktoba 1961 ya koma San Francisco don gudanar da wasan farko na Amurka na Britten "Midsummer Night's Dream". Ya gudanar da "Auren Figaro" don wasan farko a bikin Glyndebourne a shekarar 1962 sannan kuma ya samar da "Der Rosenkavalier" don farkonsa tare da Covent Garden daga baya a wannan shekarar. Ya dawo sau da yawa zuwa Royal Opera a duk tsawon aikinsa, yana jagorantar babban kundin waƙoƙi wanda ya fara daga ayyukan Mozart, Puccini, Strauss, da Wagner, zuwa wasan kwaikwayo da ba a cika yin su ba kamar "Pelléas et Mélisande" na Debussy.