 The duchy comprised the Vosges, the Burgundian Gate, and the Transjura.Dagobert made his courtier Gundoin—who incidentally established monasteries in Alsace and Burgundy—the first duke of this new polity that was to last until the end of the Merovingian dynasty.While Austrasian rulers such as Chlothar and Dagobert controlled these regions through part of the seventh-century, they eventually became autonomous kingdoms as powerful aristocratic families sought separate paths across their respective realms.