Diana Lange, Ph.D. (2008), is Visiting Professor of Central Asian Studies at Humboldt-Universität zu Berlin. Specialized in Central and East Asia, her research interests include the history of knowledge and exploration, material and visual cultures, cartography and cultural interactions. Oliver Hahn, Ph.D. (1996), Bundesanstalt für Materialforschung und -prüfung, Universität Hamburg, is Professor of Archaeometry in Hamburg. His areas of research include the analysis of manuscripts, drawings, paintings, colorants and inks as well as the preservation of the cultural heritage.