(PARIS) — Paris police blocked anti-racism groups from leading a “de-colonial tour” of Paris on Sunday to call attention to monuments and streets honoring historical figures tied to the slave trade or colonial-era abuses. Instead, the protesters marched around a monument in front of the French capital’s Museum of Immigration, waving signs with proposed new street names and symbolically “renaming” them with each circle. A Paris police official said the organizers failed to declare their march route properly and so were held in place.