A number Bronze Age barrows exist nearby, along with several other small earth-works throughout the parish. Beacon Castle and Voley Castle both Iron Age Hill forts are situated nearby. Rowley Barton ("rough clearing") was a manor mentioned in the Domesday Book along with East and West Middleton.
Holwell Castle, at Parracombe was a Norman motte and bailey castle built to guard the junction of the east–west and north–south trade routes, enabling movement of people and goods and the growth of the population. Alternative explanations for its construction suggest it may have been constructed to obtain taxes at the River Heddon bridging place, or to protect and supervise silver mining in the area around Combe Martin. It was 131 feet (40 m) in diameter and 20 feet (6 m) high above the bottom of a rock cut ditch which is 9 feet (3 m) deep. It was built in the late 11th or early 12th century.
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- "Holwell Castle, Parracombe". The Gatehouse. Retrieved 2008-01-03.
- "St Petrock, Parracombe". Churches Conservation Trust. Retrieved 16 October 2010.[permanent dead link]
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