He defeated Desiderius, the last king of Lombardy, and his rear-guard met disaster passing through the Pyrenees at Roncevaux Pass.
This man fought a series of conflicts with Tassilo III before claiming Bavaria for himself at the Synod of Frankfurt, and he fought a war over Italian coastal lands with Nicephoros I. He defeated Desiderius, the last king of Lombardy, and his rear-guard met disaster passing through the Pyrenees at Roncevaux Pass. After the death of his son, the Treaty of Verdun divided his lands between Lothair, Louis the German, and Charles the Bald. For 10 points, name this king of the Franks crowned Holy Roman Emperor in 800 CE.
This man fought a series of conflicts with Tassilo III before claiming Bavaria for himself at the Synod of Frankfurt, and he fought a war over Italian coastal lands with Nicephoros I.
{Charlemagne} [or {Carolus Magnus} or Charles the {Great}; prompt on "{Carolus}" or "{Charles}"]