Ängsö Castle

Ängsö Castle, also known historically as Engsö Castle, is a prominent stone and brick fortress situated on the island of Ängsö in Lake Mälaren, near Västerås in Sweden. While the lower sections of the four-story cubical structure date back to the Middle Ages, the building underwent significant transformations over the centuries. It was redecorated and expanded during the 1630s before acquiring its current appearance in the 1740s. This final aesthetic evolution included the addition of the fourth storey and roof, designed by the renowned architect Carl Hårleman between 1740 and 1741, blending medieval foundations with later architectural styles.

The site holds deep historical roots, first appearing in a royal charter by King Canute I between 1167 and 1196, who noted inheriting the property from his father, King Eric IX. After passing through the ownership of Riseberga Abbey and Gregers Birgersson, it became the seat of the Sparre family for over two hundred years starting in 1475. Originally built as a fortress by Bengt Fadersson Sparre in the 1480s, the castle was famously besieged and captured by King Gustav Vasa in 1522 due to the owner's political allegiance to Denmark. Following this conflict, the property was eventually returned to the Sparre lineage before passing to the Piper family in 1710.

Owned by the Piper family until 1971, the castle is now managed by the Westmanna foundation. Recognized for its cultural value, it was designated as a listed building in 1965 and had previously been converted into a museum in 1959. Today, Ängsö Castle serves as a tourist attraction, opening its doors to visitors during the summer months. Its long continuity of ownership and architectural layers make it a significant landmark in Västmanland County, offering insights into Swedish medieval history and aristocratic life.