Björkudden[1] (Finnish: Koivuniemi) is a manor house in Östersundom, Helsinki, Finland, designed by the architect Wilhelm Linsén[2] and built in the mid-19th century. Koivuniemi was the home of the Finnish writer and historian Zacharias Topelius.[3][4] After his death it returned to the previous owners and is to the present owned by the Lilius family.