Theo Adam (1 August 1926 – 10 January 2019)[1][2] was a German operatic bass-baritone and bass singer who had an international career in opera, concert and recital from 1949.

He eventually added Amfortas in Parsifal, Hans Sachs and Veit Pogner in Die Meistersinger von Nürnberg, and the title role in Der fliegende Holländer to his Bayreuth performance credits.

[4] He made his first appearance at the Salzburg Festival as Ochs in Der Rosenkavalier by Richard Strauss in 1969, returning there three years later in the title role of Alban Berg's Wozzeck.

[7] At the Metropolitan Opera, he appeared first as Sachs in Die Meistersinger on 7 February 1969,[4] alongside Pilar Lorengar as Eva, John Alexander as Stolzing, conducted by Joseph Rosenstock.

That same year he was Wotan in Das Rheingold and Die Walküre, alongside Birgit Nilsson, Régine Crespin, Lili Chookasian, and Jon Vickers, conducted and directed by Herbert von Karajan.

After a sixteen-year absence, Adam returned for the last time in March 1988 as Wotan in Die Walküre with Peter Hofmann as Siegmund, Sabine Hass as Sieglinde, conducted by James Levine.