Oswiu of Northumbria
A charter, dated 664 AD, records the gift by King Wulfhere of Mercia of "some additions" to the endowment for the monastery of Medeshamstede, already begun by his deceased brother King Peada of the Middle Angles, and by King Oswiu of Northumbria. This charter is a forgery, produced for Peterborough Abbey either in the late 11th century, or in the early 12th; but, like Hugh Candidus, clearly it reflects Peterborough tradition, and it is both accurate and historically interesting in a number of ways, including in the chronology of kings. The connection with Peada places Medeshamstede's foundation between about 653 and 656 AD.