This event is in the past.It took place on September 21, 2025 at Hôtel de ville de Boulogne-Billancourt.
Walking TourWalking TourStep inside a Tony Garnier Art Deco masterpiece as the Hôtel de Ville turns 90. This rare open house mixes playful hands-on exhibits with augmented reality journeys through 1930s Boulogne and medieval Notre-Dame.
Art Deco architecture
Family-friendly
Interactive exhibits
Heritage celebration
Tips
🧱build your own at the Lego workshop
⛪step into 1319 Notre-Dame via AR
🎲play the giant game of goose
Journées du Patrimoine 2024
Boulogne-Billancourt
Walking TourWalking TourStep inside a Tony Garnier Art Deco masterpiece as the Hôtel de Ville turns 90. This rare open house mixes playful hands-on exhibits with augmented reality journeys through 1930s Boulogne and medieval Notre-Dame.
Art Deco architecture
Family-friendly
Interactive exhibits
Heritage celebration
Tips
🧱build your own at the Lego workshop
⛪step into 1319 Notre-Dame via AR
🎲play the giant game of goose
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