A master craftsman or master tradesman (sometimes called only master or grandmaster) was a member of a guild. In the European guild system, only masters and journeymen were allowed to be members of the guild.
An aspiring master would have to pass through the career chain from apprentice to journeyman before he could be elected to become a master craftsman. He would then have to produce a sum of money and a masterpiece before he could actually join the guild. If the masterpiece was not accepted by the masters, he was not allowed to join the guild, possibly remaining a journeyman for the rest of his life.
Originally, holders of the academic degree of "Master of Arts" were also considered, in the Medieval universities, as master craftsmen in their own academic field.
This tradition originates in Medieval Europe. The earliest guilds were "frith" or "peace" guilds - groups bonded together for mutual protection following the breakdown of the kins, which were groups related by blood ties.
Merchant guilds - associations of international trades - were powerful in the twelfth and thirteenth centuries, but lost their ascendancy with the rise of the craft guilds - associations of master craftsmen, journeymen, apprentices and the various trades connected with a particular craft.
The world-renowned College of Arms in London awarded the coat of arms of The Guild of Master Craftsmen in 1992, after four years of assessment. Designed by heraldic expert Peter Greenhill to reflect the many categories of Guild membership, it features: three escutcheons (shields) to represent artists, painters and stainers; a pair of compasses opened in chevron for building, construction and carpenters; a dovetail (separating the top third of the shield from the rest) to represent cabinetmaking, woodworking and joinery; and a gavel and chisel for masons and stoneworkers. The southern keep of Lewes Castle, which overlooks the Guild’s headquarters, is featured above the helmet as the crest.