May - The Swedes takes Kalmar from the Danes after the Conquest of Kalmar.
June - Gustav Vasa is elected King in Strängnäs and the Kalmar Union is thereby formally dissolved.
June - The city of Stockholm is taken by the Swedes after the Conquest of Stockholm.
June - Stockholm Castle is taken by the Swedes.
June - Gustav Vasa make his formal entry to Stockholm and is celebrated as King.
November - The last Danish-held stronghold in Sweden-Finland, Viborg Castle, is taken by the Swedes.
1523 in Sweden Wikipedia
Events from the year 1523 in Sweden