Kolga manor was founded in 1230 by the Cistercian monastery, located on the Swedish island of Gotland. In 1581 Sweden’s King Johan III presented Kolga to his army commander, Pontus de la Gardie. Through marriage, the manor changed hands from this well-known Swedish family to the Stenbocks who were the owners until the land reforms of 1920. In 1993 the grandiose mansion was returned to the Stenbocks. The building’s history has had many phases: the stone building, built in de la Gardie’s time, has remained intact among the other buildings. Between 1765 and 1768 Count Karl Magnus Stenbock had a late-Baroque central section with a high roof built.
The Stenbock family is one of the most famous Swedish families. Their forefather, Field Marshal Magnus von Stenbock, was one of the most influential people in Sweden alongside King Karl XII. Generally known as humane masters, his grandson Carl Magnus von Stenbock became notorious for permitting 1200 farmers from his manor to be deported to Ukraine in the 18th century. Among all the family members bearing military titles, there were also those with a different destiny, such as Eric von Stenbock, bohemian poet and a friend of Oscar Wilde, who died at a young age in England. Today the manor is in the hands of Finnish relatives of the Stenbock family.
Kolga was one of the largest manors in Estonia. With its 50000 hectares of land and many other smaller manors nearby, such as Kiiu and Kõnnu, all in all it was almost the size of some smaller German duchies. Even if most of the buildings are in ruins, the manor still leaves a powerful impression. Next to the main house, in the former stable, is a cosy hotel (with 20 double rooms) and conference rooms are located in the manager's house. The main building houses the village shop and a rural restaurant.
Ängsö Castle was first named as "Engsev" in a royal charter by king Canute I of Sweden (r. 1167-1196), in which he stated that he had inherited the property after his father Eric IX of Sweden. Until 1272, it was owned by the Riseberga Abbey, and then taken over by Gregers Birgersson.
From 1475 until 1710, it was owned by the Sparre family. The current castle was built as a fortress by riksråd Bengt Fadersson Sparre in the 1480s. In 1522, Ängsö Castle was taken after a siege by king Gustav Vasa, since its owner, Fadersson's son Knut Bengtsson, sided with Christian II of Denmark. However, in 1538 it was given by the king to Bengtsson's daughter Hillevi Knutsdotter, who was married to Arvid Trolle.
In 1710, the castle was taken over by Carl Piper and Christina Piper. Ängsö Castle was owned by the Piper family from 1710 until 1971, and is now owned by the Westmanna foundation. The castle building itself was made into a museum in 1959 and was made a listed building in 1965. It is currently opened to visitors during the summers.
The castle is a cubical building in four stores made by stone and bricks. The lower parts is preserved from the middle ages. It was redecorated and expanded in the 1630s. The 4th storey as well as the roof is from the expansion of Carl Hårleman from 1740-41. It gained its current appearance in the 1740s.