Why did Brittany resist the French crown’s centralizing policies?

Brittany’s resistance to the French crown’s centralizing policies was rooted in its historical status as an independent duchy and the specific terms of its incorporation into France.

Following the marriage of Anne of Brittany to two successive French kings, the region was formally incorporated into the kingdom in 1532. Crucially, this treaty of incorporation guaranteed the province specific local privileges. Over the subsequent two centuries, Brittany actively resisted the crown’s efforts to erode these autonomous rights in favor of centralized control.1

This desire to maintain regional uniqueness is deeply tied to Brittany's distinct Celtic heritage, which has historically set it apart from other parts of France. Even after becoming part of the French state, the region remained a conservative area that prioritized the preservation of its traditional social structures, religious practices, and the Breton language. This enduring sense of identity continues to be reflected in modern separatist movements that affirm the uniqueness of the province.1