Catherine Jagiellon was a princess of the Polish–Lithuanian Commonwealth and Queen of Sweden from 1569 as the wife of King John III. Catherine had significant influence over state affairs during the reign of her spouse. She negotiated with the pope to introduce Counter-Reformation in Sweden. She was the mother of Sigismund III Vasa.
- Occupation
- queen regnant
- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- November 1, 1526
- Died
- September 16, 1583, November 16, 1583