It is located in the southwestern part of the historical centre of the city, between the Academy building and the Leiden Observatory.

In 1857, a part was used for building the new Leiden Observatory.

He became director of the Leiden Observatory in 1872 upon the death of Frederik Kaiser.

She is Professor of Molecular Astrophysics at Leiden Observatory.

Although professional astronomical observations are no longer carried out from Leiden itself, the department still calls itself Leiden Observatory.

He was director of the Leiden Observatory from 1919 until his death.

All other aspects of the program, including analysis of the photographs, were to be conducted at Leiden Observatory.

After graduating he joined the staff of the Leiden Observatory, where he worked on binary stars.

He earned his Ph.D. degree from Leiden Observatory in 1956.

From 1919 to 1946 Hertzsprung worked at Leiden Observatory in The Netherlands, from 1937 as director.