Archduchess Cecilia Renata, Queen of Poland, passed away on 24 March 1644. She was the daughter of Ferdinand II, Holy Roman Emperor and the wife of Władysław IV Vasa.
Since the late sixteenth century, the Habsburgs had sought closer ties with the Polish–Lithuanian Commonwealth, hoping to secure themselves against the rising Ottoman threat as well as against the ever-restless Kingdom of Hungary. A generation earlier, the sisters Anna of Austria and Constance of Austria—granddaughters of Ferdinand I, Holy Roman Emperor and nieces of Maximilian II, Holy Roman Emperor—had successively married Sigismund III Vasa, who had children by both of them. Thus, although sixteen years her senior, Władysław was Cecilia Renata’s first cousin.
Cecilia Renata was said to have gained popularity for her kindness, politeness, and benevolence, which contrasted with her husband’s stubborn and self-centred character. Their relationship, however, largely depended on political circumstances. During the early years of their marriage, when the alliance between Kraków and Vienna was strong, Cecilia Renata exercised considerable influence over affairs of state. As political ties loosened, Władysław grew increasingly indifferent towards his wife.
The marriage produced three children, none of whom survived to adulthood. Cecilia Renata died in childbirth at the age of thirty-two. The subsequent death of their seven-year-old son a few years later left Władysław without a legitimate heir. As his second marriage also produced no surviving sons, his half-brother John II Casimir eventually succeeded him on the Polish throne.