Bülow, Hans Guido, Freiherr von (häns gēˈdō frĪˈhĕr fən büˈlō) [key], 1830–94, German pianist and conductor. After hearing Wagner's Lohengrin in 1850 at Weimar under Liszt's direction, he studied piano with Liszt and later conducted the premieres of several of Wagner's operas. In 1857 he married Liszt's daughter Cosima, who left him in 1869 and later became the wife of Wagner. While retaining his admiration of Wagner's music, Bülow became the most ardent champion of Brahms. He framed the aphorism that Bach, Beethoven, and Brahms are the three B's of music. One of the first pianists to be concerned with stylistically proper performances, Bülow made critical editions of the works of many composers. The first of the modern virtuoso conductors, he achieved his greatest distinction as conductor (1880–85) of the ducal orchestra at Meiningen.
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