That edict revoked the Edict of Nantes, which was issued by a former member of this group named Henry IV.
Sixty-three members of this group were killed while holding service in a barn in the Massacre at Vassy. Members of this group were given tax-free status in Brandenburg-Prussia for ten years by Frederick Wilhelm's Edict of Potsdam. They were the targets of Francis, Duc de Guise. One stronghold of these people was taken by Cardinal Richelieu and was La Rochelle. Tolerance for these people was revoked by Louis XIV when he issued the Edict of Fontainebleau. That edict revoked the Edict of Nantes, which was issued by a former member of this group named Henry IV. For 10 points, name these French Protestants.
Sixty-three members of this group were killed while holding service in a barn in the Massacre at Vassy.
Huguenots [prompt on "French Protestants" or similar descriptions]