Vikings: The Real Ragnar Lodbrok | History Channel | Laughing Historically

March 28/29 in the year 845 Paris is sacked by Viking raiders, probably under Ragnar Lodbrok, who collects a huge ransom in exchange for leaving.

One of the most popular Norse heroes among the Vikings and a larger than life character, Ragnar Lodbrok was a legendary Viking commander who became a scourge of England and France.

He received the surname Lodbrok, on account of the strange coat he wore, he was also known as 'Hairy Breeches' which name he was given because of the trousers he wore made from animal skin which his wife had made him. Ragnar claimed descent from the great Odin, God of War himself and was linked to two famous shieldmaidens, Lathgertha in the Gesta Danorum, and Queen Aslaug according to the Völsungasaga.

Several of the tales about Ragnar Lodbrok seem to originate with the deeds of several Viking heroes and his historicity remains a disputed issue among historians. Ragnar Lodbrok is referred to in several sources including the Anglo-Saxon Chronicle, the Tale of Ragnar Lodbrok, a sequel to the Völsunga saga, the legendary saga the Tale of Ragnar's sons, the Ragnarsdrápa, a skaldic poem of which only fragments remain, attributed to the ninth century poet Bragi Boddason, the Krákumál, Ragnar's death-song, a Scottish skaldic poem and the Gesta Danorum, written in the twelfth century by the Christian chronicler Saxo Grammaticus. The Frankish annals, or the Annals of St. Bertin record a Viking by the name of "Reginheri" (a Latin form of Ragnar) who raided France and died in the year 845.
http://www.englishmonarchs.co.uk/vikings_9.html
https://en.wikipedia.org/wiki/Ragnar_Lodbrok
https://en.wikipedia.org/wiki/Siege_of_Paris_(845)