Hartlepool Abbey, also known as Heretu Abbey, Hereteu Abbey, Heorthu Abbey or Herutey Abbey, was a Northumbrian monastery founded in 640 CE by Hieu, the first of the saintly recluses of Northumbria, and Aidan of Lindisfarne, on the Headland Estate of Hartlepool now called the Heugh or Old Hartlepool, in County Durham, England.