It was then that he promptly married Godepert's sister in order to relate himself to the Bavarian Dynasty of Theodelinda.
The famous treasure of Monza contains the Iron Crown of Lombardy and the theca persica, enclosing a text from the Gospel of John, sent by Pope Gregory I (590-604) to her for her son Adaloald.
When Authari died in Pavia in 590, possibly by poison, he was succeeded as king by Agilulf, duke of Turin, on the advice, sought by the dukes, of Theodelinda, who married the new king.