Wilhelm II, German Emperor | Wilhelm II | Wilhelm Reich | Gottfried Wilhelm Leibniz | Georg Wilhelm Friedrich Hegel | Wilhelm Keitel | Friedrich Wilhelm Joseph Schelling | Wilhelm Furtwängler | Karl Wilhelm Friedrich Schlegel | Wilhelm Wundt | Wilhelm Sasnal | Wilhelm Kempff | Wilhelm Busch | Wilhelm Westphal | Wilhelm von Knyphausen | Wilhelm von Bode | Wilhelm Steinitz | Wilhelm Schlenk | Wilhelm Heinrich Roscher | Wilhelm Gesenius | Wilhelm Canaris | Prince Wilhelm of Hesse-Philippsthal-Barchfeld | Friedrich Wilhelm Freiherr von Bülow | Franz Wilhelm Junghuhn | Carl Wilhelm Siemens | Wilhelm von Tegetthoff | Wilhelm von Schütz | Wilhelm von Humboldt | Wilhelm Solheim | Wilhelm Schüchter |
His writings include studies on Wilhelm Lehmbruck, Eugène Delacroix, Nicolas Poussin, Jan Vermeer, John Constable, Paul Cézanne, Raphael, Vincent van Gogh, Paolo Veronese, Ernst Barlach and attacks on the methodology of the "second Vienna school" of art history dominated by Hans Sedlmayr.
Recent major exhibitions include Sigmar Polke: Lens Paintings, Wilhelm Lehmbruck: Sculptures and Etchings, and Major Works of Marcel Broodthaers, as well as the first New York solo exhibitions of Hurvin Anderson, Aaron Curry, and Enrico David.