15th and 16th centuries

In 1417 a man called Lasse Skytte is named as the owner of Sjundby manor in written records. This is also the earliest record of the manor house.^[2]

Bridge over river Sjundbyån. Sjundby manor with storage buildings in 2022.

The next time Sjundby manor is mentioned in written records is in the mid-1500s when Jakob Henriksson Hästesko is named as the owner of the estate. Under his time the estate gained land and the main building, which resembles a medieval castle, was built. King Gustav I of Sweden visited Sjundby on 1 December 1555. He was impressed by the greatness of the manor house and made it into a Kungsgård by the year 1556. The newly established county of Sjundbygård included the areas of what is nowadays known as municipalities of Siuntio, Kirkkonummi, Ingå and Espoo. However the county wasn't a long-lasting one. Already in 1558 county of Raseborg overtook Sjundbygård.^[2]

17th century

Princess Sigrid of Sweden arrived to Sjundby in 1603. Not a lot of information has been left behind of her time at the manor house but it is known that her mother, Karin Månsdotter, visited Sjundby. Therefore, a room inside the main building was named in her honour. Princess Sigrid returned to Western Sweden, as Finland was then the eastern part of the country, when she was married to Henrik Tott. In 1618 the ownership of Sjundby was transferred to princess Sigrid's son Åke Tott who gained fame as a soldier. He was later appointed privy councillor.^[5]

In December 1660 baron Ernst Johan Creutz bought Sjundby from Tott. He renovated the manor house and founded a new garden. Creutz was buried in St. Peter's church in Siuntio and you can still see his coat of arms hanging on a wall inside the church.^[5]

18th century

At the end of the 17th century Tomas Teuterström bought Sjundby. Teuterström was knighted by the king of Sweden and his last name was changed to Adlercreutz. This was the start of the Adlercreutz family's ownership of Sjundby that has lasted over 300 years.^[6]

During the Great Wrath Sjundby was badly damaged. For example, fireplaces and windows were destroyed when the manor house was robbed of all movables. Also St. Peter's Church in Siuntio was greatly damaged and therefore services were held at Sjundby for a while.^[6]

After the Treaty of Nystad in 1721 the new owner of Sjundby, Helena Adlercreutz, started to renovate Sjundby. The renovation was hardly finished when Sjundby caught fire which ended up destroying the whole roof of the manor on 1 May 1723.^[6]

19th century

During the 19th century after the Finnish War between 1808–1809 Sweden loses the area of Finland to Russia. The Grand Duchy of Finland gets a strong autonomy in the Russian empire and life at Sjundby goes on. An observation tower designed by painter Helene Schjerfbeck's brother Magnus Schjerfbeck is built on the grounds of Sjundby in 1892. At that time Sjundby was owned by Tomas Adlercreutz, Helene Schjerfbeck's godfather. Schjerfbeck even painted landscapes depicting Sjundby.^[7][8]

During the 19th century Aldercreutzes of Sjundby had an own ship called Vänskapen (English: friendship). The family sailed from Sjundby for example to Helsinki, St. Petersburg, Stockholm and even Spanish costal towns.^[7]

20th century

During the early 20th century almost 500 people worked for Sjundby Manor. After the building of coastal railway between Helsinki and Turku even Sjundby got an own station at Vik. Railway traffic quickly replaced steam ship traffic to the manor.^[9]

Sjundby around year 1900

During the Finnish Civil War in 1918 the supporters of Red Finland briefly occupied Sjundby until the manor was liberated by the German troops.^[9]

Many families escaped to the grounds of Sjundby from Helsinki during the Second World War when Helsinki was bombed. Parts of the collections of the National Museum of Finland, the National Archives of Finland and Helsinki University Archives were evacuated to Sjundby and stored in the medieval stone cellars of the manor house. After the Second World War Porkkala Naval Base was rented to Soviet Union. This rental area included much of Siuntio and the whole area of Sjundby forcing the Adlercreutz family to evacuate their home together with many other families. During the rental time Sjundby served as Soviet army officers base. Porkkala was returned to Finland on 26 January 1956 and after the Finnish Defence Forces had inspected the area people were able to return to their homes. Huge damages were waiting for Adlercreutz family at Sjundby. For example, fireplaces had been destroyed and holes had been made to the wooden floor which had then been used as toilets.^[9]

21st century

Nowadays Sjundby manor is still serving as a private home. Guided tours are sometimes operated in parts of the manor house and its grounds during summer months.^[3][4]