Past activities
Nieuwe activiteiten
Planktonium
Museum De Lakenhal shows planktonium by Jan van Ijken: a magical art film about the life of plankton.
The Leiden Maths Walk
For lovers of maths, there's a walk they can go on all by themselves: The Leiden Maths Walk with challenging mathematical questions.
Route of Discoveries
There have been a lot of amazing and important discoveries done in Leiden. Follow the Route of Discoveries: see new places in the city or fi...
Playing with mathematics
Maths is really everywhere. Make a whirlpool and build your own bridge. Discover what sound looks like and play with perspective like an art...
Exhibition: Everything Under Control
TROEF is the place were Stichting ROEM displays artwork. From the 16th of September onwards, there will be a new exhibition named "Everythi...
Seeing Stars Citizen Science
During the night of Seeing Stars Leiden, Citizen Science will try to answer many burning questions!
More-than-Planet
Starting on the 2nd of July, you can view a new exhibition at the Leiden Observatory: More-than-Planet. How do we imagine our planet?
The Leiden Maths Walk
For lovers of maths, there's a walk they can go on all by themselves: The Leiden Maths Walk with challenging mathematical questions.
Route of Discoveries
There have been a lot of amazing and important discoveries done in Leiden. Follow the Route of Discoveries: see new places in the city or fi...
Playing with mathematics
Maths is really everywhere. Make a whirlpool and build your own bridge. Discover what sound looks like and play with perspective like an art...
11th World Sponge Congress
The World Sponge Conference is hosted every 3-4 years and brings together international scientists from all around the globe to meet up and ...
Planktonium
Museum De Lakenhal shows planktonium by Jan van Ijken: a magical art film about the life of plankton.
Exhibition: Everything Under Control
TROEF is the place were Stichting ROEM displays artwork. From the 16th of September onwards, there will be a new exhibition named "Everythi...
Seeing Stars Citizen Science
During the night of Seeing Stars Leiden, Citizen Science will try to answer many burning questions!
More-than-Planet
Starting on the 2nd of July, you can view a new exhibition at the Leiden Observatory: More-than-Planet. How do we imagine our planet?
Playing with mathematics
Maths is really everywhere. Make a whirlpool and build your own bridge. Discover what sound looks like and play with perspective like an art...