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History
Viking ring fortress
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A Viking ring fortress, Trelleborg-type fortress, or trelleborg, is a type of circular fort of a special design, built in Scandinavia during the Viking Age. These fortresses have a strictly circular shape, with roads and gates pointing in the four cardinal directions. Inside the fort, each quadrant has one, in a single case four, square blocks of longhouses, completing the geometric symmetry. There are a total of five confirmed Viking ring fortresses at present, located in Denmark. They have been dated to the reign of Harold Bluetooth of Denmark, with an estimated near contemporary time of construction c. 980. Their exact historical context is subject to debate. In 2023, the five Danish forts were inscribed on the UNESCO World Heritage List because of their unique architecture and testimony to the military power of the Jelling Dynasty.
Aerial view of the Viking ring fortress of Trelleborg, near Slagelse in Denmark. This was the first discovered Viking ring fortress, and the geometry
Aerial view of the Viking ring fortress of Trelleborg, near Slagelse in Denmark. This was the first discovered Viking ring fortress, and the geometry is clearly visible.
Aerial view of the Viking ring fortress of Aggersborg. The similarity in design with Trelleborg near Slagelse, is clearly evident.
Aerial view of the Viking ring fortress of Aggersborg. The similarity in design with Trelleborg near Slagelse, is clearly evident.
Recreation of a typical building at Fyrkat
Recreation of a typical building at Fyrkat
Denmark
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Denmark is a Nordic country in the south-central portion of Northern Europe. It is the metropolitan part of and the most populous constituent of the Kingdom of Denmark, a constitutionally unitary state that includes the autonomous territories of the Faroe Islands and Greenland in the North Atlantic Ocean. Metropolitan Denmark is the southernmost of the Scandinavian countries, lying south-west and south of Sweden, south of Norway, and north of Germany, with which it shares a short border, Denmark's only land border.
The gilded side of the Trundholm sun chariot dating from the Nordic Bronze Age
The gilded side of the Trundholm sun chariot dating from the Nordic Bronze Age
The Ladby ship, the largest ship burial found in Denmark.
The Ladby ship, the largest ship burial found in Denmark.
Larger of the two Jelling stones, raised by Harald Bluetooth
Larger of the two Jelling stones, raised by Harald Bluetooth
The Assault on Copenhagen on 11 February 1659 during the Second Northern War. Danish defenders under King Frederick III successfully repelled the forc
The Assault on Copenhagen on 11 February 1659 during the Second Northern War. Danish defenders under King Frederick III successfully repelled the forces of the Swedish Empire. Painting by Frederik Christian Lund.