Skuldelev ships

The Skuldelev ships is a term used for 5 original Viking ships recovered from the waterway of Peberrenden at Skuldelev, c. 20 km north of Roskilde in Denmark. In 1962, the remains of the submerged ships were excavated in the course of four months. The recovered pieces constitute five types of Viking ships and have all been dated to the 11th century. They were allegedly sunk to prevent attacks from the sea.

• http://en.wikipedia.org/wiki/Skuldelev ships