More than 1,000 years after his death in what is now Poland, a European king whose nickname lives on through wireless technology is at the center of an archaeological dispute.

Harald Sigurdsson’s saga Harald Sigurdsson has a saga dedicated to him titled Haralds saga Sigurðarsonar. This story features in a manuscript called the Heimskringla , written by Snorri Sturluson.

The king's fortress at Trelleborg Following incursions into Denmark by Holy Roman Emperor Otto II, Harald Bluetooth rolled out fortifications across Denmark in 980.