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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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There are two ways to visit us:

  1. Tuesday-Sunday with a walk-in tour.
  2. In the weekend as part of a visit to the Hortus Botanicus.

If you have a question about visiting us, you can call us in the weekend between 11:00 and 16:00 on 071-5271891 or send us an email at coordinator@oudesterrewacht.nl.

Because we work with a small team, it can sometimes take a while for us to get back to you. We aim to answer questions within one week.

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.

Then you can 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, please send us an email at coordinator@oudesterrewacht.nl and we will get back to you.


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

Sterrewachtlaan 11, 2311 GW Leiden

The starting point of our exclusive tours is at the first dome at the start of the terrain. You can read more about our tours here.


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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