Person

John III of Sweden

1537–1592 · 16th century

John III of Sweden was a son of Gustav Vasa who received the Duchy of Finland in 1556. His independent foreign policy and marriage to the Polish princess Catherine Jagiellon led his brother Eric XIV to imprison him. He deposed Eric in 1568 and reigned as king until 1592, and his son Sigismund also became king of Poland.

John III of Sweden
Image: After Johan Baptista van Uther · Public domain · Wikimedia Commons

Mentioned in 1 state history

Duchy of Finland

See also

Cite this entry
APA
The Epoch Institute. (2026). John III of Sweden. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/john-iii-of-sweden
MLA
“John III of Sweden.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/john-iii-of-sweden. Accessed .
Chicago
The Epoch Institute. “John III of Sweden.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/john-iii-of-sweden.
Harvard
The Epoch Institute (2026) ‘John III of Sweden’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/john-iii-of-sweden (Accessed: ).

Last reviewed October 2026Random entry ↻