Journées du Patrimoine 2026
September 19
Once a year, Saint-Ouen's locked doors swing open. Wander through historic buildings and municipal spaces that are usually off-limits, from grand halls to unexpected corners of local life.




Saint-Ouen-sur-Seine
Step inside Saint-Ouen's working town hall for a rare glimpse at its grand halls and historic murals. Heritage Day opens doors you normally can't walk through.
Tips
Saint-Ouen-sur-SeineOpens Friday at 8:30 AM




Step inside Saint-Ouen's working town hall for a rare glimpse at its grand halls and historic murals. Heritage Day opens doors you normally can't walk through.
Tips