Today, we use the word 'masterpiece' to describe any work of exceptional skill or artistic merit. However, in the medieval and Renaissance guild system, a 'masterpiece' had a very specific technical meaning. To move from the rank of 'journeyman' to 'master,' an artisan had to produce a specific piece of work that demonstrated their full mastery of their craft—be it painting, goldsmithing, or carpentry. This 'master-piece' was then judged by the existing masters of the guild. If it met their high standards, the artisan was allowed to join the guild, open their own shop, and take on apprentices. This rigorous system ensured a high level of technical quality and the preservation of traditional skills, creating the standards of excellence that still define the arts today.