Sterrewacht Leiden – Staircase Sterrewacht Leiden – Staircase Sterrewacht Leiden – Library Sterrewacht Leiden – Wooden telescope Sterrewacht Leiden – Lenses Old Observatory in Leiden Old Observatory in Leiden "Prive steiger, verboden aan te meren" Meeting room of Leiden Observatory Observatory of Leiden University – Dome Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Sterrewacht Leiden – Telescope Sterrewacht Leiden – View from one of the domes Sterrewacht Leiden – Telescope Sterrewacht Leiden – 24 hours clock View of the Old Observatory Stargazing Building project former Van der Klaauw Lab Telescope Telescope Observer chair on which Einstein sat Looking out of Leiden Observatory Temporary bridge The Old Leiden Observatory The Old Leiden Observatory Rijksmuseum Boerhaave 2017 – Meridian circle Building project Sterrewacht Hortus Botanicus 2018 – View Leidens Ontzet 2019 – Parade – Observatory Rijksmuseum Boerhaave – Snellius’ large astronomic… Alien eggs Sterrewacht Leiden – Made in Switzerland Sterrewacht Leiden – Lecture room Sterrewacht Leiden – View of Leiden from one of th… Sterrewacht Leiden – Domes Sterrewacht Leiden – Library Sterrewacht Leiden – Opening to the sky Sterrewacht Leiden – Library Observatory of Leiden University – Universal joint Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Leidse Sterrewacht Observatory of Leiden University – gears Restored Observatory of Leiden University The Leiden Observatory at dusk Bust of Frederik Kaiser inside Leiden Observatory Pater bridge and Observatory