Gamleborg in Almindingen
900
Gamleborg in Almindingen is constructed
Gamleborg is Bornholm’s oldest stone building from the Viking Age (750–1050 CE) and the island’s oldest royal fortress.
The earliest finds at the site date back to around the year 900.
Around the year 1100, the fortress was reinforced with a massive granite wall.
1150
Gamleborg is abandoned
Around 1150, Lilleborg was built, located only about 700 metres northwest of Gamleborg. The new fortress took over its function, after which Gamleborg was abandoned.