He has had solo exhibitions at the Moderna Museet in Sweden, Fondazione Prada in Milan, Kunsthaus Bregenz in Austria and the Hamburger Bahnhof in Berlin.

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Since being performed at Bregenz, Szymanowski's operas have been performed by the English National Opera in London and by companies in Houston, New York, Chicago, France, Poland and Germany.

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Now based in Schwarzach, a city near the regional capital of Bregenz, Mr. Kaufmann, 57, is known for his innovative approach to wood, which he has used for everything from multi-story office buildings and luxury homes to kindergartens and covered bridges.

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