Keilberth was a regular at Bayreuth in the early 1950s, with complete Ring cycles from 1952, '53, and '55, as well as a well-regarded recording of Die Walküre from 1954 (the whereabouts of rest of the cycle are unclear) in which Martha Mödl, perhaps the greatest Wagnerian actress and tragedian, performs her only recorded Sieglinde. He made the first stereo recording of Wagner's Ring Cycle in 1955, as well as a so-called "second cycle" with Mödl, rather than Astrid Varnay, as Brünnhilde. Mödl's accounts of Brünnhilde, from the 1953 Ring as well as the 1955 "second cycle," are her only recordings of the role other than Wilhelm Furtwängler's 1953 Rome Ring. Among his other recordings, his interpretations of Wagner's Lohengrin at the 1953 Bayreuth Festival released on Decca-London, Weber's Der Freischütz made in 1958 for EMI, and a 'live' set of Richard Strauss's Arabella (featuring Lisa Della Casa and Dietrich Fischer-Dieskau) made in 1963 for DG are still considered among the best versions. He conducted the TV-broadcast German-translation performance of The Barber of Seville, featuring Fritz Wunderlich, Hermann Prey, and Hans Hotter. His Haydn 85th and Brahms Fourth Symphony recordings on Telefunken are no less distinguished.