Norbert Wolf graduated in art history, linguistics and medieval studies at the universities of Regensburg and Munich, and earned his PhD in 1983. He held visiting professorships in Marburg, Frankfurt, Leipzig, D�sseldorf, Nuremberg-Erlangen, and Innsbruck. His extensive writings on art history include many TASCHEN titles, such as Diego Vel�zquez, Ernst Ludwig Kirchner, Caspar David Friedrich, Expressionism, Romanesque, Landscape Painting and Symbolism.
Ingo F. Walther (1940-2007) was born in Berlin and studied medieval studies, literature, and art history in Frankfurt am Main and Munich. He published numerous books on the art of the Middle Ages and of the 19th and 20th centuries. Walther's many titles for TASCHEN include Vincent Van Gogh, Picasso, Art of the 20th Century, and Codices Illustres (2001).