The research project Let the Material Talk: The Technology of Late Medieval Cologne Painting from the Master of Saint Veronica to Stefan Lochner (2009 to spring 2014) was sponsored by the Federal Ministry of Education and Research. An interdisciplinary team studied the rich collections of medieval Cologne paintings of the Wallraf-Richartz-Museum & Fondation Corboud in Cologne and the Alte Pinakothek in Munich. These artworks from the late-14th to the mid-15th century were painted by important artists who were working in Cologne at that time, including the Master of Saint Veronica, the Master of Saint Lawrence and the only one mentioned by name Stefan Lochner. The joint project carried out in close cooperation by these two museums and the Doerner Institut has been presented on a symposium in November 2011 with postprints published in 2012 and a richly illustrated book published in German in July 2013. An English edition has been published in 2014.