Overview
- The site closes to the public on Monday for a five- to six-month program, with reopening planned for spring 2026.
- Upgrades include ventilation, drainage and electrical systems, new short‑wave lighting, and restoration of ossuary walls and décor.
- Visitor experience will be refreshed with a new scenography and immersive audio guides, while additional cameras increase supervision.
- Administrators cite sustained pressure from roughly 2,000 daily visitors, with CO2 and bacteria compounding damage in the humid galleries.
- Works will use historic access shafts for logistics, and reports put the project budget at about €5.5 million.