During the High Middle Ages, Brenner Pass was a part of the important Via Imperii, an imperial road linking the Kingdom of Germany north of the Alps with the Italian March of Verona. In the carolingian Divisio Regnorum of 806 the Brenner region is called per alpes Noricas, the transit through the Noric Alps.[5] Since the 12th century, the Brenner Pass was controlled by the Counts of Tyrol within the Holy Roman Empire. Emperor Frederick Barbarossa made frequent uses of the Brenner Pass to cross the Alps during his imperial expeditions into Italy.[6] The 12th-century Brenner Pass was a trackway for mule trains and carts.