Conversation so far:
what is wrong with ragnar's last son
In the 2013 TV series Vikings, because Ragnar did not heed Aslaug's warnings, Ivar was born with weak bones, his legs twisted and seemingly broken.
what is the 2013 tv series vikings based on
The 2013 TV series Vikings is inspired by the sagas of Viking Ragnar Lothbrok.

Question: when does the series take place
Self-contained rewrite: when does thr 2013 tv series vikings take place