The scream from Knuts Tower at Akershus Fortress. Knut Alvssøn the only man in history who has successfully attacked and conquered the fortress (the early 1500s). The king sent his best men to reclaim the fortress. The kingsmen successfully trapped Knut and killed him. Knuts body was placed in Knuts tower to rotten, denying him a burial. Throughout the years many have heard a scream from Knuts tower either the night to 15 of August when Knut was trapped or night to 16 of August when he was killed.