Old Observatory Leiden

The Old Observatory Leiden is the oldest remaining university observatory in the world. This historical monument still plays an educational role for the University and the city of Leiden.

On this website you will find information about the history of the observatory, as well as information about visits, the visitors centre, guided tours, events and the local amateur astronomy societies.

ATTENTION: due to the implementation of our upcoming exhibition the visitor center will be closed on the following weekends;

• 1-2 February
• 8-9 February

Starting from February 15th we'll be showing the new exhibition, that'll be all about the 'Drake Equation'.