Discover Denmark's Viking Age Ring-Shaped Fortresses

Discover the five ring-shaped Viking fortresses that were built during the early Middle Ages in Denmark as either trading posts or military bases.

The Viking Age Ring Fortress Of Trelleborg, Sjælland, Denmark

5 Danish Viking Ring Fortresses inscribed as UNESCO World Heritage

Viking ring fortress, artwork - Stock Image - C015/0324 - Science Photo Library

New viking fortress discovered in Denmark

Discover Denmark's Viking Age Ring-Shaped Fortresses

New Viking Ring Fortress Discovered in Denmark

Viking-Age Aggersborg - Medieval Histories

Laser Tech Reveals 1,000-Year-Old Viking Ring Fortress in Denmark

Viking Fortress at Erritsø

A) Denmark with the five known ring fortresses from the Viking Age, 1)