Christiansø Museum

Christiansø Museum comprises two historic towers — Store Tårn and Lille Tårn — on the Ertholmene archipelago, approximately 20 km northeast of Bornholm, Denmark. The towers feature exhibitions about the island's fortress heritage and fishing history. The nearby Ballonen Prison on Frederiksø, dating to 1825, houses a small exhibition about the political prisoner Dr. Dampe.