Peterborough Abbey Cambridgeshire United Kingdom

Sweyn II of Denmark had promised to leave England but returns in spring 1070, raiding along the Humber and East Anglia toward the Isle of Ely, where he joins up with Hereward the Wake, a local thegn.

Hereward's forces on June 1 attack Peterborough Abbey, which they capture and loot.

The British government begins work on a forty-acre (one hundred and sixty-two thousand square meters) site at Norman Cross, for the world's first purpose-built prisoner-of-war camp.