1. Vikings wore horned helmets
This most be the biggest misconception about Vikings, but the fact remains, there are no records of such helmets having ever existed.
All depictions of Viking helmets dating to the Viking age, show helmets with no horns and the only authentic Viking helmet that has ever been found does not have them either.
An explanation for the helmet with horns myth is that Christians in contemporary Europe added the detail to make the Vikings look even more barbarian and pagan, with horns like Satan’s on their head.
It should be noted that the Norse god Thor wore a helmet with wings on it, which do look somewhat similar to horns.