The monarchs of France ruled, first as kings and later as emperors (the Bonapartes only), from the Middle Ages to 1870. There is some disagreement as to when France came into existence. The earliest date would be the establishment of the Merovingian Frankish kingdom by Clovis I in 486 with the defeat of Syagrius, the last Roman official in Gaul. That kingdom's rulers were deposed in the 8th century. The Treaty of Verdun established the Kingdom of Western Francia in 843.