Grand bal en tenue d'époque Second Empire dans le salon Berlioz de l'opéra de Vichy au cours de l'événement "Vichy fête Napoléon III" (Palais des Congrès / Grand Casino, Vichy (03200), Allier (03), Auvergne, France). / The great fancy dress ball (Second Empire period dress), on the occasion of the happening: "Vichy celebrates Napoleon III". That event was held late in April in the Berlioz lounge of the Vichy's Opera house (Allier - Auvergne - France).