Gråborg, Medieval castle ruins in Öland, Sweden
Gråborg is a fortress ruin on the Swedish island of Öland with circular stone walls that survive in places between 4 and 7 meters high. The structure features three entrance gates positioned around its perimeter, which once controlled access to this fortified settlement.
This fortress was built in the 6th century and later developed into a protected marketplace after Vadstena Abbey took control in 1450. The site then played an important role in defending this region against Danish attacks.
The chapel dedicated to Saint Knut once stood here, reflecting the spiritual role this fortress held for the local community. Visitors can still see traces of the religious structures that existed within the walls.
The site is easily accessible and well suited for a day visit, particularly if you look into local guided tours beforehand. The best time to explore is during the warmer months, when conditions for walking around the walls are pleasant.
This is the largest ancient fortress on the entire island and shows traces of multiple construction phases that took place over centuries. Archaeological finds from this site are now displayed in Kalmar Museum and provide insight into the daily life of its former inhabitants.
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