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Contact us

We always try to answer questions about the Old Observatory Leiden as well as possible. Choose the subject you have a question about from the dropdown menu below.

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Then you can contact our tour coordintaor, Carmen Turner, by sending an e-mail to rondleidingen@strw.leidenuniv.nl

You can also directly request a tour by filling in our sign up form.

You can reach the visitors centre from Tuesday to Friday between 13.00 and 17.00 and in the weekends from 11:00 to 17:00 at +31 71 527 1891.

Then you can best contact the Service Desk of the Kamerlingh Onnes Gebouw.

You can contact the institute Leiden Observatory via email or by visiting the institute's website.

For all other questions, you can contact Pedro Russo.

For substantive questions about tours, you can best send an e-mail to rondleidingen@strw.leidenuniv.nl. We aim to answer your question within two weeks.


Rapenburg 73 2311 GJ Leiden

The starting point of the exclusive tours is at the visitor’s centre. You can reach the visitor’s centre via the main entrance of the Hortus Botanicus leiden. The address of the main entrance of the Hortus Botanicus is Rapenburg 73 2311GJ Leiden. From April 30th to the end of September, there is a second entrance at the Talcott house during the weekend, at the end of the Sterrewachtlaan. You need a valid ticket of the Hortus Botanicus to reach the visitor’s centre.

The address of the main entrance to the Old Observatory is:

Sterrewachtlaan 11 2311 GW Leiden

Note: you cannot reach the visitor’s centre via the main entrance.


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.

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