Arresødal was created as a manor in 1773 by Major General Johan Frederik Classen. He ordered the building of the main house in 1786-1788. Upon his death, Classen bequeathed Arresødal to Prince Charles of Hesse-Kassel, who owned the property until Crown Prince Frederik (later King Frederick VI of Denmark) bought the property in 1804. The main building was rebuilt in 1908-1909 and partly in 2004. Two other buildings on the estate are protected.
In 1883 the property was purchased by the Classen Fideicommis. It was then a convalescent home for women until 1944 when it was taken over by first the Germans and then the freedom fighters who used the buildings as a prison. It once again became a convalescent home until 1984 when Arresødal was sold to KMD Kommunedata.
Today Arresødal functions as a private hospital. The park is now open to the public.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.