Battles & Campaigns · 1656
Treaty of Labiau
Labiau (Polessk), Kaliningrad Oblast, Russia
What happened
During the Second Northern War, Sweden needed Brandenburg's support. Sweden made Frederick William full ruler of the Duchy of Prussia, instead of a vassal, and in return he paid money and promised religious freedom to Lutherans there.
Why it matters
It ended Prussia's status as a fief held under another king. This later allowed the rulers of Prussia to call themselves kings.
What came next
Frederick William later switched sides and made a treaty with Poland at Wehlau in 1657.
Did you know?
In 1701 Frederick I crowned himself king of Prussia, building on the sovereignty won at Labiau.
Timeline
- 20 Nov 1656Treaty of Labiau signed.
- 19 Sep 1657Treaty of Wehlau with Poland.
- 18 Jan 1701Frederick I crowned king in Prussia.