This important book presents the results of a comprehensive technical study of the painters in Cologne between 1400 and 1450. It represents a major step forward in understanding the materials and techniques of panel painting in the 15th century achieved through dendrochronological evidence and examination of the ground and intermediate layers, pigments etc. In addition to discussions on the results of the analyses, there is a catalogue of 29 fifteenth century panels together with the results of their examinations.