The Revolt of the Brotherhoods was a revolt by artisan guilds (Germanies) against the government of King Charles I in the Kingdom of Valencia, part of the Crown of Aragon. It took place from 1519–1523, with most of the fighting occurring during 1521. The Valencian revolt inspired a related revolt in the island of Majorca, also part of Aragon, which lasted from 1521–1523.
The revolt was an anti-monarchist, anti-feudal autonomist movement inspired by the Italian republics.
La pau de les Germanies, by Marcelino de Unceta.
The Revolt's failure is often seen as a political catalyst for Valencia's shift to a modern, centralized, and authoritarian state away from a feudal one. The local nobility were weakened, and needed to call upon royal power to defeat the rebels. The conversion of the mudéjars shrank the pool of cheap labor that the noblemen had relied upon. And though the timing may be a coincidence, Germaine's appearance in Valencia helped weaken the old nobility and reinforce royal power in Valencia.