highly structured from the first records; it was necessary to be the legitimate son of a member, to give proofs of competence in the craft involved, and to pay an entrance tax. Masters of the guilds, who possessed the means of production, took on apprentices and garzoni, the "boys" or journeymen who might work through a long career without ever becoming a master.

Each of the Arti was ruled according to its statutes, which had the force of law, and might pass judgement in controversies among its members