[1] [2] The Tøyen estate is rich in history, and the main wing is probably the oldest wooden building in greater Oslo.
King Frederik VI of Denmark later acquired the estate and subsequently gifted the property to the University of Christiania in 1812.
[3] Today the historic Tøyen Manor houses temporary exhibitions and a café for staff and visitors.
He contributed greatly to the planning and construction of the botanical garden and to the operation during the next first 40 years.
The garden originally covered 75,000 square metres, but has since doubled in size.