Public notice about air raid shelters opened to the public in the event of attacks by enemy flying machines, Prefecture of Police, Ile de la Cité, 4th arrondissement
In February, the authorities were not yet anticipating long-range mortar fire reaching the city. They organized a commission to take responsibility for locating potential air raid shelters.
Préfecture de Police
Poster, February 6, 1918
© Bibliothèque historique de la Ville de Paris / Roger Viollet