Hans von BÃ 1\/4 low ( born Dresden , 8 January 1830 ; died Cairo , 12 February 1894 ) was a German conductor and pianist . Hans Guido Freiherr von BÃ 1\/4 low ( January 8 , 1830 -- February 12 , 1894 ) was a German conductor , virtuoso pianist , and composer of the Romantic era .