 The palace has interiors from the 18th century and an important collection of Swedish paintings.King Gustav Vasa had a fortress built at Strömsholm in the 1550s.From 1560 until 1621, it served as the residence of queen dowager Catherine Stenbock, and after this, it was given to a later queen dowager, Maria Eleonora of Brandenburg who, however, preferred to reside at Gripsholm Castle.