Visit the Old Observatory
The Old Observatory is still used intensively as a university building. Yet there is still plenty to see and experience in this beautiful monument. Find out what the possibilities are here.
Open two times a week for visits in combination with the Hortus Botanicus Leiden
If you visit Hortus Botanicus Leiden on Saturday or Sunday, you can combine it with a visit to the Old Observatory. At the far end of the botanical garden you will find the visitor center of the Old Observatory. Here, you can walk through an exhibition about the last 100 years of discoveries made in astronomy. You can also take part in a fun walk-in tour during your visit! Read more about our visitor centre. Opening times of the visitor center (on weekends only):
- Summer (April 1st - October 31st): 10:00 - 18:00
- Winter (November 1st - March 31st): 10:00 - 16:00
Guided tours and open evenings
In addition to free guided tours of half an hour at the visitor centre, we also offer the possibility to book private tours for groups. These guided tours can be planned for a date and time of your preference and are available from €65. Read more about our guided tours.
Monthly open evenings are also organised by one of the Leiden societies for amateur astronomy. For only €4 per person you can enjoy an astronomical lecture and (depending on the weather) observation time with the telescopes. Read more about our open evenings.