Nikolaus Harnoncourt
A particular favorite of Herbert von Karajan, she also sang under Carlos Kleiber, Karl Böhm, Riccardo Muti, Daniel Barenboim, Nikolaus Harnoncourt, Mstislav Rostropovich, Rafael Kubelík, James Levine and Wolfgang Sawallisch, as well as the stage directors Jean-Pierre Ponnelle and Giorgio Strehler.