
The Helsingborg ring fort might have been the largest of them all, at a diameter of 270 m. The existence of a Viking ring fortress at Helsingborg in modern Sweden, was suggested in 2009 after archaeological excavations since 1987.
Trelleborgen in Trelleborg, Skåne, modern Sweden. Borrering near Køge, Zealand, Denmark. Borgeby north of Lund at Lödde Å in Skåne, modern Sweden. The fort in Borgeby has been dated to around 1000 AD, so it is possible that it too, was built by the same king.ĭenmark and Sweden are currently applying for admission of the Viking ring fortresses as UNESCO World Heritage sites. Most of them have been dated to the reign of Harold Bluetooth of Denmark (died 986). There are a total of seven known Viking ring fortresses at present, located in Denmark and Scania, Sweden. These common structures are sometimes partially encircled by advanced ramparts, but these additions are not always circular. All trelleborgs have a strictly circular shape, with roads and gates pointing in the four cardinal directions. They are also known simply as trelleborgs. This was the first rediscovered Viking ring fortress, and the geometry is clearly visible.Ī Viking ring fortress, or Trelleborg-type fortress, is a type of circular fort of a special design, built in Scandinavia in the Viking Age. Aerial view of the Viking ring fortress of Trelleborg, near Slagelse in Denmark.