17 lugl 1538 anni - The betrothal ceremony of 12-year-old Princess Elisabeth, niece of Charles V, Holy Roman Emperor to the 17-year-old Prince Sigismund II Augustus, son of King Sigismund of Poland (who is also the Grand Duke of Lithuania) and heir to the throne, takes place in Innsbruck.[8] The two are married five years later on May 5, 1543