On 11 July 1789, soldiers of the Royal-Allemand regiment attacked a large but peaceful demonstration on the Place Louis XV organized to protest the dismissal by the king of his reformist finance minister Jacques Necker. The reform movement turned quickly into a revolution.[82] On 13 July, a crowd of Parisians occupied the Hôtel de Ville, and the Marquis de Lafayette organized the French National Guard to defend the city. On 14 July, a mob seized the arsenal at the Invalides, acquired thousands of guns, and stormed the Bastille, a prison that was a symbol of royal authority, but at that time held only seven prisoners.