Opinions

Prof. Karl Ruhrberg

Former director of the Art Gallery Düsseldorf in the Ludwig Museum, Cologne
President of the international association of art critics (German Section, AICA)

The painted formula

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Dr. Thomas Föhl

Art historian Klassik Stiftung Weimar
Member of the Board of Directors

Art historical events and connections with scientific research results in Dieter Liedtke's works

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