The marriage between King Authari and Theodelinda represented a significant political alliance in the late 6th century Lombard kingdom. Authari, the Lombard king, sought to bolster his authority and enhance stability through this union. Theodelinda, as the daughter of Garibald I, the Bavarian duke, brought with her not only dynastic connections but also a strong Catholic faith. This was crucial, as the Lombards were predominantly Arian Christians at the time, and her influence would play a critical role in furthering Catholicism within Lombard society.

The union is notable not only for its political ramifications but also for the cultural exchanges it fostered between the Lombards and Bavarians. Theodelinda’s presence in the Lombard court allowed for the introduction of Bavarian customs and traditions, which blended with the existing Lombard culture. By the influence of their queen, many Lombard nobles and citizens would begin to convert to Catholicism, leading to significant changes in the religious landscape of Northern Italy.

The marriage also had lasting effects on the Lombard succession. With Theodelinda, Authari would have heirs who would inherit not only the Lombard kingdom but also the evolving Catholic identity that she promoted. This pivotal marriage exemplifies the strategic use of marital alliances in ancient European politics as a means of strengthening power within increasingly complex tribal societies.