Visit Paris city hall in French. Weekly visits are available for thirty individuals. It is recommended to sign up at least two months in advance. During the summer, visits are held twice a week. More information is available at Salon d’Accueil, 29 rue de Rivoli (4° arrondissement) from Monday to Saturday, 10 am to 7 pm. Their phone number is +33142764343. If you are in a group, call +33142765404. The tours are in French, English, German, Spanish, Italian, Russian and last one hour.