According to
Bede (who wrote his history in the early 8th century), a 'city' named
Ythanceaster existed on the River
Penta. The Chapel of St Peter-on-the-Wall was almost certainly originally built by Bishop
Cedd in 654. No further record exists of the chapel being used until 1442, when the local clergy reported to the Bishop of London that it had been expanded slightly, with a small tower above the porch with a bell in it. However they did not know of its origins and it was unusable, having been burnt. It was repaired and returned to regular use alongside the parish church in
Bradwell-on-Sea until at least the
Tudor period (16th century) before falling into disuse as a church again and being used as a barn—the position of the wide barn doorway, now filled in, can be seen on the south side of the nave. In 1920, it was restored and reconsecrated as a chapel. Following wartime damage it was once again restored by the architect
Laurence King. It was designated as a Grade I
listed building in 1959. In May 2023, a book entitled
St Peter-on-the Wall Landscape and Heritage on the Essex Coast was published. It reflected concerns over the planned
Bradwell B nuclear power station, which it was feared would damage the local environment and the setting of the Chapel. ==Current use==