Siegmund Nimsgern, a German bass-baritone, was born on January 14, 1940, in Sankt Wendel, Saarland. He studied musicology at the University of Saarbrücken and vocal training at the Hochschule für Musik Saar. Nimsgern's breakthrough came with wins at the 1965 International Vocal Competition 's-Hertogenbosch and the 1967 Mendelssohn Competition in Berlin. He made his debut at the Saarländisches Staatstheater in Saarbrücken in 1967 as Lionel in Tchaikovsky's The Maid of Orleans. Nimsgern performed at prestigious venues such as La Scala in Milan, the Metropolitan Opera in New York, and the Bayreuth Festival. He was known for portraying "evil, dark, ambiguous figures" including Pizarro in Beethoven's Fidelio and Telramund in Wagner's Lohengrin. Other dark roles he performed include Kaspar in Weber's Der Freischütz, Ruthven in Marschner's Der Vampyr, Klingsor in Wagner's Parsifal, Scarpia in Puccini's Tosca, Bartók's Bluebeard and Hindemith's Cardillac. He performed at La Scala in Milan and the Metropolitan Opera in New York, and portrayed Wotan in Wagner's Der Ring des Nibelungen at the Bayreuth Festival from 1983 to 1986. Notable recordings include works by Bach with Nikolaus Harnoncourt and Helmuth Rilling. Nimsgern won a Grammy Award for his role in the 1989 recording of Wagner's Lohengrin. He passed away on September 14, 2025, in Sankt Ingbert, Saarland, at 85.