Sandby borg is an ancient ringfort located on the island of Öland in Sweden. It is believed to date back to the 5th century AD, during the Migration Period.
The site was first discovered in 2010 and has since been the subject of extensive archaeological research. The ringfort covers an area of approximately 4800 square meters and is surrounded by a wall that is up to 4 meters high and 15 meters wide in some places. The wall is made up of large limestone blocks and is fortified with wooden structures.
Excavations at the site have revealed that it was the scene of a violent attack, possibly a massacre, in which many of its inhabitants were killed and left unburied. The remains of at least 26 individuals, including men, women, and children, have been found at the site, many of them with evidence of violent deaths. The attackers appear to have looted the fort and taken much of its valuable goods.
Sandby borg is unique in that it provides a rare glimpse into the lives of the people who lived in Sweden during the Migration Period, a time of great social upheaval and change.