, 1553. Both their parents neglected the issue of the marriage of the youngest three Jagiellon sisters. Only after their father's death in 1548, the first serious candidate for a husband emerged –
Albert Alcibiades, Margrave of Brandenburg-Kulmbach, but he was a
Hohenzollern and a Protestant, had debts and a bad temper. In the summer of 1548, after a conflict with King Sigismund II Augustus over his secret marriage with
Barbara Radziwiłł, Queen Mother Bona and her unmarried daughters moved to
Mazovia, mainly
Warsaw and
Ujazdów Castle. In 1550, Bona attempted to negotiate marriage with Charles Victor or Philip, sons of
Henry V, Duke of Brunswick-Lüneburg, or
Prince Ernest of Bavaria. After a family meeting in May 1552 in
Płock, Sigismund II Augustus considered marrying his sisters to King
Gustav I of Sweden, Dukes
John Frederick II and
Johann Wilhelm of Saxony, and Duke
John Albert I of Mecklenburg, but lacked resolve and consistency. In January 1556, Bona managed to arrange a marriage for
Sophia. A month later, Bona departed for her native Italy, leaving her two unmarried daughters alone in Warsaw. After about a year, Sigismund II Augustus brought his sisters to
Vilnius, where they became close to his third wife,
Catherine of Austria. Even though Anna was already in her mid-thirties, Sigismund investigated marriage proposals. Widowed
Ferdinand I, Holy Roman Emperor, did not want to remarry; his unmarried son
Charles II (born 1540) was too young; Tsar
Ivan the Terrible was not deemed beneficial for Poland–Lithuania; and
John Frederick, Duke of Pomerania did not want an alliance with Poland and Lithuania as it would have drawn the
Duchy of Pomerania into the
Livonian War. King
Eric XIV of Sweden was personally more interested in pursuing marriage with
Queen Elizabeth I of England, but sought an alliance with Poland–Lithuania and suggested his half-brother
John, Duke of Finland. John agreed, but asked for Catherine. It was against custom for a younger sister to marry first; their wedding was postponed. Three more grooms were proposed for Anna: Danish prince
Magnus was supposed to become a Lutheran bishop which would be an unacceptable marriage for the Kingdom's Catholic majority; the last Master of the
Livonian Order Gotthard Kettler was not of royal blood and his control of Livonia was tenuous; and John's younger brother,
Magnus, Duke of Östergötland. Sigismund II Augustus agreed to the double Polish–Swedish alliance, but only John arrived at the wedding in Vilnius. The court demanded that John marry Anna, but he insisted on Catherine. Needing Swedish troops and money in the Livonian War, Sigismund II Augustus relented if Anna did not protest. Though it must have been humiliating, Anna agreed and Catherine married John on 4 October 1562. As Vilnius wasn't safe due to the Livonian War, Anna moved to the
Royal Castle in Warsaw and lived there for about ten years with a court of about 70 people. She spent her time playing games, embroidering, praying, and corresponding with her sisters. Her brother visited her annually when he attended sessions of the
general sejm ("Parliament") in Warsaw. Even though Anna was already in her forties, marriage proposals continued to come in. In 1564,
Reichard, Count Palatine of Simmern-Sponheim, proposed but perhaps was deterred by her relatively small dowry of 32,000 Polish
red złoty. In 1568, her sister Sophia proposed to Eberhard, eldest son of
Christoph, Duke of Württemberg, but he died the same year. In 1569, a project emerged to marry Anna to
Barnim X, Duke of Pomerania, who demanded that she would bring eight border territories as her dowry, which was unacceptable to Poland. In 1572, Sophia proposed
Albert Frederick, Duke of Prussia, but Sigismund II Augustus refused. == Interregnums ==