The viking ships of Roskilde. Towards the close of the Viking Age the fairways of Roskilde Fjord were blocked by a series of barriers to protect the important trading town of Roskilde from attack by enemy fleets. The five viking ships in the Roskilde Viking Ship museum come from one of these blockages in the Peberrende channel at Skuldelev, 20 km north of Roskilde. Here, a total of five ships were sunk across the channel and boulders heaped up on top of them. In 1962 a coffer dam of sheet...