Festival
Open Day Old Observatory
- Date
- Saturday 4 October 2025
- Time
- Location
- Old Observatory
Sterrenwachtlaan 11
2311 GW Leiden
Have you always wanted to know more about astronomy?
Saturday, October 4, is the Open Day at the Old Observatory. On this day, the entire building will be open and free to visit. Various activities will be taking place throughout the historic building. Visit the light lab, take a trip in the mobile planetarium, or visit the Plants and Planets exhibition. The historic telescopes are also open to visitors for only €5 per person.
Whether you know a lot about the universe or very little, are young or old, there is something for everyone at the Old Observatory. We look forward to seeing you on October 4!