From Bayeux to the Bastille: The fortress key as a sign of peace and revolution – DHM-Blog | Deutsches Historisches Museum https://www.dhm.de/blog/2025/04/02/from-bayeux-to-the-bastille-the-fortress-key-as-a-sign-of-peace-and-revolution/
who used to negotiate between the different parties with a “white flag� in hand