A fight between vikings

My oldest son Niklas, is an archeologist and this weekend he takes part in a viking market outside Lund. They dresses up in clothes from that time, talk about how the vikings lived, show how they build there houses, craftsmen show and sell handicraft and so on. They even have some danish vikings fighting with swords. It looked very realistic and scary! (The most southern part of Sweden belonged to Denmark up 1658.)