The Role of Van Eyck in Alberti, in “Theories of Vision and Visualisation Techniques in the Fifteenth Century”, Jointly organized by the Vlaams Academisch Centrum, Vlaamse Academie van België voor Kunsten en Wetenschappen, and the Institut für Cusanus Forschung, University of Trier, Brussels and Bernkastel-Kues, September 9-16, 2007.