thumb|250px|Koivuniemi in 1879 thumb|250px|The library at Koivuniemi
thumb|250px|Koivuniemi in 1879 thumb|250px|The library at Koivuniemi
Björkudden () is a manor house in Östersundom, Helsinki, Finland, designed by the architect Wilhelm Linsén and built in the mid-19th century. Koivuniemi was the home of the Finnish writer and historian Zacharias Topelius. After his death it returned to the previous owners and is to the present owned by the Lilius family.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).