Born in Milan (his year of birth is debated between 1919 and 1923, though 1923 is given as official), he began singing as a member of a madrigal group. Cesare Siepi often claimed to have been largely self-taught, having attended the music conservatory in his home city for just a short time. His operatic career was interrupted by World War II. After his debut in 1941 (in Schio, near Venice, as Sparafucile in Rigoletto), Siepi, an opponent of the fascist regime, fled to Switzerland. After the end of the war his career immediately took off. Success as Zaccaria in Nabucco at La Fenice in Venice was followed by the first of many engagements at La Scala, Milan. His early engagements there were in the Verdi bass roles, the title role in Boito’s Mefistofele under Arturo Toscanini, as Colline in La bohème, and in La Gioconda, La favorite, and I puritani. Siepi debuted abroad in 1947, at the Liceu in Barcelona in Donizetti’s Anna Bolena, but his international reputation was established in 1950, when Sir Rudolf Bing brought him to the Metropolitan Opera in New York to open the 1950 season as King Philip II in Don Carlos. He was to remain principal bass at the Met until 1974, adding roles such as Boris Godunov (in English) and Gurnemanz in Parsifal (in German), and singing all the major roles of the bass repertoire. His debut at the Royal Opera House, Covent Garden, was in 1950, and he appeared there regularly until the mid-1970s. In 1953, Siepi debuted at the Salzburg Festival with a legendary production of Don Giovanni conducted by Wilhelm Furtwängler, staged by Herbert Graf, and designed by Clemens Holzmeister. He made an immediate impact in the title role of the opera, which became perhaps his best known role, as it had been for the most famous Italian bass of the generation before, Ezio Pinza. This performance has been released on CD, and a 1954 mounting of this production was filmed in color and released in 1955.

Cesare Siepi was a frequent guest at the Vienna State Opera. In 43 performances he sang Don Giovanni, more often than any other singer in modern times except for Eberhard Wächter. In 1967 Siepi was Don Giovanni in a controversially received production staged by Otto Schenk and designed by Luciano Damiani that showed Mozart’s masterpiece in the light of the commedia dell’arte, emphasizing the comic and ironic elements of this opera (conductor Josef Krips strongly opposed this production’s concept). In Vienna he also sang Basilio (Il barbiere di Siviglia), Colline (La bohème), Fiesco (Simon Boccanegra), Figaro (Le nozze di Figaro), Padre Guardiano (La forza del destino 1974 in a new production conducted by Riccardo Muti), Gurnemanz (Parsifal), Méphistophélès (Faust), Filippo II (Don Carlos), and Ramphis (Aida). His final performance at Vienna was in Norma (Oroveso) at the Austria Center Vienna in 1994. He was a particularly fine recital artist, especially in Community Concerts under Columbia Artist Management, and a sensitive interpreter of German Lieder. He married Met ballerina Louellen Sibley and they had two children. Siepi enjoyed a long career, and performed regularly until the 1980s, including lead roles in the ill-fated Broadway musicals Bravo Giovanni and Carmelina. In addition to his studio recordings, there are also many live recordings of performances of his major roles. Siepi’s formal farewell to the operatic stage occurred at the Teatro Carani in Sassuolo on 21 April 1989. Indeed, Capon’s List shows live recordings made as late as 1988. Siepi’s last studio recording was as the old King Archibaldo in RCA’s 1976 taping of Italo Montemezzi’s L’amore dei tre re, with Anna Moffo and Plácido Domingo in the cast. Cesare Siepi died at Piedmont Hospital in Atlanta, Georgia on July 5, 2010 after suffering a stroke more than a week earlier.