Annette Hagedorn studied the history of oriental art, German literature, and art history at the universities of Bonn and Mainz. She has held part-time teaching posts at the universities of Bonn, Mainz and Utrecht. In 1991 she was awarded the Alice-Boner-Memorial Prize from the Alice Boner Foundation in Zurich for her dissertation on Islamic metalwork in the 13th and 14th centuries. Since 2000 she has been co-editor, responsible for art history and archaeology, of the journal Zeitschrift der Deutschen Morgenl�ndischen Gesellschaft.
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.