Introduction of Vasteras
City and capital of Vastmanland county, 60 mi W of Stockholm, on Lake Malaren. Founded in a.d. 1100 it was one of the great medieval cities of Sweden. The scene of 11 important diets, it was here that Gustavus Vasa formally introduced the Reformation into Sweden in 1527 by creating a Lutheran state church. The throne of Sweden was made hereditary here by the diet of 1544.