Queen of Poland from 1575 to 1586. She was the daughter of Poland’s King Sigismund I the Old, and the wife of Stephen Báthory. She was elected, along with her then fiancé, Báthory, as co-ruler in the second election of the Polish-Lithuanian Commonwealth. Anna was the last member of the Jagiellon dynasty.
Her early life was rather mundane. She embroidered church vestments, was involved in works of charity, and fulfilled her obligations as a princess. Anna gave up her suitor, John, Duke of Finland, in favour of her sister Catherine, remaining unmarried until the age of fifty-two. Thirty-three years at the side of her overbearing mother had taught her not only patience and calmness, but also the conviction that a woman could be as good a monarch as a man.
In 1572, her brother Sigismund II Augustus died, leaving the thrones to the Polish-Lithuanian Commonwealth vacant. In 1572 Jean de Monluc, Bishop of Valence, offered the French prince Henry to the electors of the commonwealth as the next king. Montluc promised the electors that Henry would marry Anna, “to maintain the dynastic tradition”. However, after Henry was elected as the first monarch in the Polish-Lithuanian Commonwealth, he withdrew his promise and they never wed.
In June 1574, Henry left Poland to assume his new duties as King of France (Henry III) and by May 1575 the Parliament of the Commonwealth had removed him as their monarch. During the second interregnum, Anna assumed the unprecedented but politically important title of infanta, mirroring the Spanish custom and highlighting her dynastic status. She referred to herself as Anna, by the Grace of God, Infanta of the Kingdom of Poland.
By the autumn of 1575 a new candidate was offered to the electors of the commonwealth, Stephen Báthory, Prince of Transylvania. Stephen had to agree to the condition that he would marry Anna Jagiellon, which he did. On 15 December 1575, near Warsaw, Anna along with Stephen Báthory, her fiancé, was elected as co-rulers, as the second monarch in the Polish-Lithuanian Commonwealth with the dual title of King of Poland and Grand Duke of Lithuania The coronation took place in Krakow on 1 May 1576.
With the death of her husband in 1586, she had one final play to influence the thrones of the Commonwealth. She put forth to the electors, her nephew Sigismund, the only son of her sister Catherine and John III of Sweden. With Anna’s help, he gained the thrones of the Polish-Lithuanian Commonwealth as its third elected monarch.
Anna died in Warsaw on 9 September 1596, during Sigismund’s reign, as the last Jagiellon.
Link to Wikipedia biography