Episode Details

The Vikings are as famous as marauding pirates, but why did they also build monumental fortresses?

Archaeologists are investigating the great ring fort at Trelleborg in Denmark, built at the end of the Viking Age. This huge circular structure lay hidden for more than a thousand years beneath the frozen soil of Denmark. Now new discoveries across the Viking world are revealing more about the story of Harold Bluetooth - the great king who united Viking people – and what brought the Vikings’ reign of terror to an end.

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