In 1349 the users from the guilds unsuccessfully rebelled in opposition to the patricians in a Handwerkeraufstand ('Craftsmen's Uprising'), supported by merchants plus some by councillors, resulting in a ban on any self-organisation from the artisans in the city, abolishing the guilds that were customary in other places in Europe; https://sluiterklik.nl/voordelen-van-graffiti-workshops-ontwikkel-vaardigheden-creativiteit-en-gemeenschapszin/