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Gro Tump Mound & Bailey Castle is a medieval motte and bailey castle situated in Wales. The monument comprises an earthen mound topped by a timber or stone fortification, typical of Norman defensive architecture from the 11th and 12th centuries. The site is founded upon Wenlock Rocks, a bedrock of mudstone, siltstone and sandstone formed during the Wenlock period of the Silurian era, which underlies much of the local landscape. This varied geology would have influenced both the stability of the earthworks and the availability of building materials during construction.
The motte and bailey design represents one of the most effective castle types of the medieval period. The raised mound, or motte, provided defensive advantage and visibility across surrounding terrain, while the adjoining bailey—an enclosed courtyard—contained domestic and military structures necessary for garrison life and administration of the surrounding lands. Such fortifications were typically established to control strategically important territory and serve as centres of lordship.
Gro Tump Mound & Bailey Castle is protected as an ancient monument under Cadw, Wales's historic monuments service, recorded under reference MG059. The site remains an important archaeological resource for understanding medieval settlement patterns and military architecture in Wales. Its earthwork preservation is vital for future archaeological investigation.
Gro Tump Mound & Bailey Castle is a scheduled monument protected by Cadw under reference MG059. View the official record →
Gro Tump Mound & Bailey Castle is a medieval motte and bailey castle situated in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference MG059.
Gro Tump Mound & Bailey Castle dates from the medieval period, and is classified as a motte and bailey. It is one of over 32,000 scheduled monuments protected across the UK.
Gro Tump Mound & Bailey Castle is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is MG059.
Several scheduled monuments lie within 10 km, including Crugyn Round Barrows (6.7 km), Crugyn Bank Dyke (6.9 km), Two Tumps Round Barrows (7.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Gro Tump Mound & Bailey Castle's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Gro Tump Mound & Bailey Castle stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is mudstone, siltstone and sandstone.