day. A botanical garden was built on the grounds of the present Sonnenborgh Observatory, and three years later the Smeetoren added an astronomical observatory. The university attracted many students from abroad (especially from Germany, England and Scotland). They witnessed the intellectual and theological battle fought between proponents of the new philosophy (René Descartes lived for a few years in Utrecht) and proponents of the strict Reformed theologian Voetius. They also witnessed the teachings of renowned Dutch jurist, Johannes Voet, a university alumnus and professor of law, whose works remain highly authoritative in modern Roman-Dutch law. In 1806, the French occupying authorities of the Netherlands downgraded Utrecht University to an école secondaire (high school), but after the establishment of the United Kingdom of the Netherlands in 1813 it regained its former status. Leiden, Leuven, Groningen, Utrecht and Ghent were the five universities () of the new state. Two of the universities (Leuven and Ghent) became part of the new Belgian state after their respective provinces separated from the United Kingdom of the Netherlands in 1830. As a result, Utrecht University remained one of only three Dutch universities. During the French occupation, King Louis Napoleon ordered the construction of a palace in the centre of Utrecht, which eventually became the University Library City Centre. Utrecht University played a prominent role in the golden age of Dutch science. Around 1850 the "Utrechtian School" of science formed, with Pieter Harting, Gerardus J. Mulder, Christophorus H. D. Buys Ballot and Franciscus Donders among the leading scientists. They introduced the educational laboratory (onderwijslaboratorium) as a practical learning place for their students. The National Veterinary School (Dutch:Rijks Veeartsenijschool) became Utrecht University's Faculty of Veterinary Medicine in 1918. As the university grew, the academic buildings in the historic city centre were unable to meet the university's increasing need for space. Therefore, starting from the 1960s, a significant part of the university moved to the De Uithof campus, which occupies the easternmost part of the city and is located south of De Bilt. However, the university continued to retain its academic buildings and presence in the historic city centre. The university is represented in the Stichting Academisch Erfgoed, a foundation with the goal of preserving the university's heritage and collections. Organisation The university consists of seven faculties: Faculty of Geosciences Department of Earth Sciences Department of Physical Geography Department of Sustainable Development (Copernicus Institute) Department of Human Geography and