Situated on a rise above the city at Karl Johansgate's northwestern end, the magnificent 173-room Slottet was completed in 1825, with highlights including the Cabinet Parlour and Cloakroom, the White Parlour, the Mirror Hall, the Great Hall, and the Banquet Hall. Throughout the year visitors are welcome to explore the grounds and gardens, see the changing of the guards, and take one of the four daily tours in English. The Norske Nobelinstitutt, which awards the Nobel Peace Prize, sits immediately south of the palace. .

It's part of Tripatini member Dayna Stephens's post 5 of Oslo's Top Attractions.