Old Observatory Leiden

The Old Observatory Leiden is open again!

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.

Until December 20th we'll be showing a new exhibition, that is all about the 'Drake Equation'.