It is agreed in the peace treaty between Sweden and Denmark-Norway that
northern Bohuslän will remain under Swedish control until a settlement
is reached over the disputed island of Gotland.
Northern Bohuslän is returned to
Denmark-Norway despite that no settlement over Gotland has been reached.
King Gustav Vasa grants his younger son Johan in 1556 a hereditary duchy
that is practically an independent state. The duchy is enlarged the
following year with a part of Nyland.
Gustav Vasa's third son Magnus is granted a hereditary duchy with the
same rights as Johan's
Estonia accepts Swedish sovereignty in return for protection from
Russian raids.
Erik XIV abolishes his brother Johan's duchy as a response to his
intimate connections with Poland.
Gustav Vasa´s youngest son Karl receives his hereditary duchy when he reached the age of 18.
Duke Magnus
insanity results in that his duchy is divided between king Johan III and
duke Karl.
The Finnish border is moved east and Sweden's possession of Estonia is
recognised by Russia in the peace of Teusina.
Duke Karl proclaims himself as king after having deposed his nephew
Sigismund. Karl's duchy is thereby returned to the crown.
Sigismund’s half brother Johan take control over the duchy he was granted in 1604
in return for the renunciation of his claim to the Swedish throne.
Karl IX grants his younger son Karl Filip a duchy. Trades and
adjustments also enlarge Duke Johan’s duchy.
