Penda was a 7th-century king of Mercia, the Anglo-Saxon kingdom in what is today the Midlands. A pagan at a time when Christianity was taking hold in many of the Anglo-Saxon kingdoms, Penda took over the Severn Valley in 628 following the Battle of Cirencester before participating in the defeat of the powerful Northumbrian king Edwin at the Battle of Hatfield Chase in 633.

Edwin, also known as Eadwine or Æduinus, was the King of Deira and Bernicia – which later became known as Northumbria – from about 616 until his death. He converted to Christianity and was baptised in 627. After he fell at the Battle of Hatfield Chase, he was venerated as a saint.