Portes ouvertes : les secrets de la Citadelle de Doullens

Welcome to the oldest fortified site in France. Built by Francis I in 1530, the Citadel of Doullens served as a military fortress and then as a women's prison… and it has yet to reveal all its secrets. A buried bunker that served as a firing range for V1 rockets, 16th-century countermines used by musketeers, traces of the First World War, graffiti hidden in the old prison… A collection of discoveries from across the ages, with Gilles Prilaux and Ludovic Moignet, from EPCC Somme Patrimoine. Live broadcasts, replays, continuous news updates... Find us on our France 3 Hauts-de-France website: ▶ https://france3-regions.franceinfo.fr... Join us on social media: Facebook: ▶   / france3nordpasdecalais   ▶   / france3picardie   Twitter: ▶   / f3nord   ▶   / f3picardie   Instagram: ▶   / france3nordpasdecalais   ▶   / france3picardie   Subscribe to our YouTube channel: ▶    / france3nord   Subscribe to our newsletter and news alerts: ▶ https://france3-regions.francetvinfo....