We always try to answer questions about the Old Observatory as good as possible. Choose from the dropdown menu below where you have a question about.
I have a question about ...
Then you can best contact the tour coordinator Naor Scheinowitz at email@example.com
Then you can best contact the Service Desk of the Kamerlingh Onnes Gebouw.
For all other questions you can contact the Old Observatory coordinator Bart Clauwens.
For very general questions you can also call +31 71 527 1891 on Wednesdays, Saturdays and Sundays between 11:00 and 16:00. On other days you can call +31 71 527 5737 during working hours.
The adress of the main entrance of the Old Observatory is:
2311 GP Leiden
Access to the visitors' centre is granted by the Hortus Botanicus, which is at the address:
2311 GJ Leiden
We strongly recommend travelling to the Old Observatory by public transport. If you want to visit by car, these are the possibilites:
There are some parking spaces on the Sterrenwachtlaan, but these are reserved for residents of the street. These cannot be used by visitors of the Old Observatory. There are a number of parking lots available in Leiden. For their locations, you can look at the website of the Leiden municipality.