Ardo is attested as the last of all Visigothic kings of Hispania, reigning from 713 or 714 until his death in 720 or 721. The Visigothic Kingdom was already severely reduced in power and area at the time he succeeded Achila II, and his dominions probably did not extend beyond Septimania and present-day Catalonia, due to the Arab conquests of the previous three years.