Artistic Training. During the late Middle Ages artists were affiliated with craft guilds that regulated the education of apprentices and the entry of masters into the guild structure. An apprentice lived at his master's house for two to seven years while he received instruction in basic skills, such as grinding pigments and mixing them for paint. At his master's workshop he would be given more challenging tasks as his skills improved and finally be awarded a journeyman's certificate by the guild. Some journeymen, such as Albrecht Durer, went on lengthy trips to improve their skills and visit other workshops. The production of a masterpiece for the guild was the final challenge before being allowed to set up an independent workshop as a master craftsman. Since much of the work created in the master's workshop was collaborative, the style of the work created...