In Basel and Freiburg im Breisgau, he became closely acquainted with the contemporary concert hall.
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His most famous students were Götz Friedrich and Harry Kupfer both of whom went on to have important careers developing Felsenstein's work.
Walter Scott | Sir Walter Scott | Walter Cronkite | Walter Raleigh | Walter Benjamin | Walter Mondale | Walter Matthau | Walter Gropius | Walter Hamma | Walter Savage Landor | Walter Burley Griffin | Walter Payton | Walter | Bruno Walter | Walter Winchell | Walter Crane | Walter Rilla | Walter Koenig | Walter Brennan | Walter Sickert | Walter Pidgeon | Walter Isaacson | Walter Damrosch | Walter Crickmer | Walter Brueggemann | Walter Reed | Walter Browne | Little Walter | Walter Runciman, 1st Viscount Runciman of Doxford | Walter Rothschild, 2nd Baron Rothschild |
After completing his studies with Nadia Boulanger in Paris and Vera Schwarz in Salzburg, Van Kesteren was invited in 1954 to Berlin's Komische Oper to sing Nurreddin in Cornelius's The Barber of Baghdad under the direction of Walter Felsenstein and to sing the title role in the first performance in Germany of Rossini's Le comte Ory under the direction of Carl Ebert at the Stadtische Oper in 1956.