Käru (Kerro) was established as an estate in the mid-18th century. The present building was built in 1878 and designed by Riga architect Robert Pflug. It is an eclectic building with mainly neo-Renaissance elements. It was damaged during the Revolution of 1905 and also during World War II. The manor house ensemble has several well-preserved and unusual outbuildings and annexes. Explorer Karl von Ditmar was the landowner of Käru and economist Ragnar Nurkse (1907–1959) was also born in Käru Manor. In the 1920s the manor started to work as a school. After the new school building was closed, the house was sold into private ownership.
References:The Royal Palace was built in the first half of the 19th century as the Norwegian residence of King Charles III, who also reigned as king of Sweden and otherwise resided there, and is the official residence of the present Norwegian monarch. The crown prince resides at Skaugum in Asker west of Oslo. The palace has 173 rooms.
Until the completion of the Royal Palace, Norwegian royalty resided in Paleet, the magnificent town house in Christiania that the wealthy merchant Bernt Anker bequeathed to the State in 1805 to be used as a royal residence. During the last years of the union with Denmark it was used by the viceroys of Norway, and in 1814 by the first king of independent Norway, Christian Frederick.