Abstract: Craft guilds have been at the core of important historiographical debates on the economic, social and political history of medieval cities for twenty years. The aim of this article is to examine the seamens guilds in the town ports of the Northern Peninsula in the Late Middle Ages. This study analyzes fundamental aspects of the social assistance, labor organization and social identity of the town ports, which were located on the maritime border of the Kingdom of Castile. In contrast to the more classic view of the craft guilds as protectionist institutions, which only served the interests of a privileged group of masters, this analysis highlights the contribution of the seamen?s craft guilds to the organization of labor at sea, the training of sea workers, the ability to negotiate with merchants and avoid labor exploitation, the provision of social assistance to the most vulnerable population, and the ability to lead the social protest for the guilders? representation in the urban government.
In summary, it is concluded that the seafarers? guilds were constituted as networks of mutual help between individuals in the labor, welfare and political spheres of the population of the town ports of northern Iberia in the Late Middle Ages.
