June 20th 840: Louis the Pious
On this day in 840, King of the Franks and Holy Roman Emperor Louis the Pious died in Ingelheim died aged 61/62. Louis succeeded his father Charlemagne upon his death in 814. He was the sole ruler of the Franks from 814 until his death. The Frankish Empire plunged into civil war upon his death, with his sons fighting for control of the Empire.