- Why this month: Open Monumentendag on September 12–13, 2026 opens historic buildings across the city.
- Best time: Early morning
- Book by: As soon as special-entry programs go live
- Crowds: High around famous canal houses
- You'll see churches, civic buildings, and canal properties that normally stay closed behind heavy doors.
- Don't miss: Lesser-known stops in Jordaan and around the canal belt
- Insider tip: Pick one famous site, then spend the rest of the day on smaller addresses nearby.








