calligrapher (d. 865) Louis the Pious, king of the Franks (d. 840) Rotrude, Frankish princess, daughter of Charlemagne (or 775) Xian Zong, emperor of the Tang Dynasty (d. 820) Zhaozhou, Chinese Zen Buddhist master (d. 897) Deaths August 15 – Roland, Frankish military leader Áed Find, king of Dál Riata (Scotland) Alpín II, king of the Picts Berhthun, bishop of Lichfield (approximate date) Congalach mac Conaing, king of South Brega (Ireland) Eterscél mac Áeda, king of the Uí Cheinnselaig (Ireland) Mac Flaithniadh, abbot of Clonfert (Ireland) Niall Frossach, High King of Ireland Sufyan al-Thawri, Muslim scholar and jurist (b. 716) References