The Forgotten Viking Age Ring Fort of Southeastern Öland

Träbyborg, also known as Trebyborg, is an ancient Viking ring fort located about 700 meters north of Träby in Segerstads socken on southeastern Öland. The site consists of three ring-shaped fortifications aligned in a north-east to south-west direction. The north-eastern and middle ring-shaped fortifications are oval, the south-western is nearly round. The source only provides the diameters for the north-eastern (48-66 meters), middle (51-65 meters), and south-western (38-44 meters).

The wall thickness is 7-10 meters. The middle ring-shaped fortification is best preserved, with the wall top 1.6 meters above the inner court. Other than the middle one, we know of 30 house foundations in the north-eastern fortification and 32 in the middle, while only 14 were found in the south-western. Rhezelius reported the construction date of Träbyborg to be the Viking Age following excavations in 1966. However, a new farm, Christineborg, was built in the south-western fortification at the end of the 1700s, and only the foundations of Christineborg remain now.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons