First let me say, I love Vikings as a fictional show and despite knowing the history I put it aside to enjoy and love the show, this post is only a resource for historical research to compliment the show and the characters in it.
I have only used characters who appeared in 7 or more episodes and they are sorted by race and available source material on Wikipedia. If I have missed one and you know of it, or have something wrong then please say something and I will update this list accordingly. I hope you all enjoy this. :)
Torstein - Unconfirmed?
Astrid - Unconfirmed?
Guthrum - Unconfirmed?
Borg - Fictional character based on Swedish Jarls
The Seer - Fictional character, Seer's were usually female and called Völva.
Eric - Fictional character, potentially based on Erik Bloodaxe.
Helga - Fictional character.
Torvi - Fictional character.
Siggy - Fictional character.
Erlender - Fictional character.
Margrethe - Fictional character.
Kalf - Fictional character.
Þorunn - Fictional character.
Note: Some of these historic connections are purely speculative and marked as "Unconfirmed", I am drafting a letter to attempt confirmation and will update if/when I get a response.
Edit: If you're going to down-vote this then provide a reason, or your cowardice will attract the attention of Thor, and not in a good way. Also I would like to hear why, not everyone wants "yes men" in their life.
Really I was shocked to know some of cast and extras have hair and beard extensions, it really looks life like. Also not to forget the awesome runes tattoos on ragnar whole head along with floki and others. The costume may not be accurate for the age but still it's good. Wonderful production aesthetics.
From 859 to 862, Björn led a large Viking raid into the Mediterranean. After raiding down the Iberian coast and fighting their way through Gibraltar, Björn and Hastein pillaged the south of France, where his fleet over-wintered, before landing in Italy where they captured the coastal city of Pisa. They proceeded inland to the town of Luni, which they believed to be Rome at the time, but were unable to breach the town walls. To gain entry a tricky plan was devised: Hastein sent messengers to the bishop to say that, being deathly ill, he had a deathbed conversion and wished to receive Christian sacraments and/or to be buried on consecrated ground within their church. He was brought into the chapel with a small honor guard, then surprised the dismayed clerics by leaping from his stretcher. The Viking party then hacked its way to the town gates, which were promptly opened letting the rest of the army in.
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