Editing Leiden Observatory (section)

===1860–1974===
[[File:Leiden old observatory2.jpg|thumb|The second building to house the Leiden Observatory (built in 1860). This building now houses part of the law faculty. Two of the optical [[telescope]] domes can be seen on the roof.]]

By 1860 the new observatory building was completed. The new building was constructed in a quiet side of the city inside the university's botanical gardens. It consisted of a number of offices, living quarters for astronomers, and a number of observing domes containing telescopes. In 1873 two new rooms were added to the building in order to house the tools required to verify nautical instruments; tools used to test compasses, sextants and other instruments. Two of the domes were rebuilt, one in 1875 and the other in 1889.<ref name=deSitter/>

More new buildings were constructed before the end of the 19th century including the Western tower in 1878, one to the East in 1898, and another small building to house a gas engine in the same year (used for electricity until the observatory was connected to the city grid). In 1896 the observatory purchased their first photographic telescope, with a dome being built to house it between then and 1898.<ref name=deSitter/>

In 1923 the observatory formed a research agreement with [[Union Observatory]] to allow researchers use of both facilities. The first visitor from Leiden was [[Ejnar Hertzsprung]]. In 1954 the telescopes were moved to [[Hartbeespoort]].<ref>{{cite web|url=http://assa.saao.ac.za/sections/history/observatories/leiden_obs/|title=Leiden Observatory|website=www.assa.saao.ac.za}}</ref> The collaboration lasted until 1972.<ref>{{cite book|author1=Piet C. van der Kruit, [[Klaas van Berkel]] |title=The Legacy of J.C. Kapteyn|date=2001|publisher=Springer|isbn=1402003749|page=125|url=https://books.google.com/books?id=Ig1T30hcXBQC&pg=PA125 |access-date=4 June 2014}}</ref>

The building is now called the Oude Sterrewacht (Old Observatory). It was restored from 2008 to 2012, and in the 2010s houses a visitor center and also has tours.<ref>{{Cite web|url=http://www.tripadvisor.com/Attraction_Review-g188630-d8119223-Reviews-Old_Observatory_Leiden-Leiden_South_Holland_Province.html|title=Old Observatory Leiden - 2019 All You Need to Know BEFORE You Go (with Photos)|website=TripAdvisor|language=en|access-date=2019-10-24}}</ref><ref>{{Cite web|url=https://www.universiteitleiden.nl/old-observatory/the-observatory/history|title=History|website=www.universiteitleiden.nl|language=en|access-date=2019-10-24}}</ref>