(1962) He performed Benjamin Britten's opera, "War Requiem" at his premiere.
(1948) He made his opera debut playing Posa in Verdi's opera, "Don Carlos" at the Berlin's Stadtische Oper (now known as Deutsche Oper) where he was hired as principal lyric baritone.
(1965) He began his American tour in New York City to sing Schubert's opera, "Winterreise," cycle without intermission.
(1949) He toured the European countries.
(Fall 1947) He gave his first professional lieder recital in Leipzig, Germany.
(1947) He made his professional debut when he substituted for a baritone in Brahsm's "German Requiem."
(1989) Author of his memoir, "Reverberations."
(1988) He sang an all-Schumann program at Carnegie Hall in New York City.