Chertsey Abbey — Wikipedia

Chertsey Abbey, dedicated to St Peter, was a Benedictine monastery located at Chertsey in the English county of Surrey. It was founded in 666 AD by Saint Erkenwald who was the first abbot, and from 675 AD the Bishop of London. At the same time he founded the abbey at Chertsey, Erkenwald founded Barking Abbey on the Thames east of London, where his sister Saint Ethelburga was the first abbess. In the 9th century it was sacked by the Danes. In 870, when it was attacked, many monks were killed. The abbot then was Beocca and those slain were known as Saint Beocca, Saint Ethor, and the Martyrs...