From the 16th century, it was built as a fortress to protect the rich Mälaren Valley from the Danish Empire. Rebuilt into a Renaissance palace by the royal Vasa family and since then very well-preserved. Guided tours are offered all year. Museum with furnishings from 16-18th centuries.
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Toy Museum
In a building from the 16th century. Tells the story of the town.
City Hall
The oldest city hall in Sweden, built in the early 15th century.
In a building from the 16th century. Tells the story of the town.
One of the largest medieval churches in Scandinavia. It holds a large collection of medieval wooden sculptures. Next to the altar is Saint Bridget of Sweden's reliquary.