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Penmark Castle is a medieval castle situated in Wales, protected as a scheduled ancient monument under Cadw reference GM229. The castle occupies a site underlain by bedrock of the Lias Group, a sequence of mudstone, siltstone, limestone and sandstone deposits formed during the Aalenian period of the Jurassic. This geology would have influenced both the accessibility of stone for construction and the natural drainage characteristics of the site.
Medieval castles in Wales served multiple functions as military strongholds, administrative centres and symbols of Norman and later Welsh power. They typically developed around a defended core—often a motte and bailey earthwork in earlier phases—with stone masonry structures added during the 12th and subsequent centuries. The choice of location frequently reflected strategic considerations including proximity to routes of communication and supply.
The survival of Penmark Castle as an earthwork monument allows the study of medieval settlement patterns and defensive architecture within the Welsh landscape. The underlying Jurassic geology of the site has shaped both its landscape context and the practical constraints faced by medieval builders and inhabitants. Archaeological investigation of such sites contributes to understanding the development of medieval Wales and the relationship between human settlement and the natural environment.
Penmark Castle is a scheduled monument protected by Cadw under reference GM229. View the official record →
Penmark Castle is a medieval castle situated in Wales, protected as a scheduled ancient monument under Cadw reference GM229.
Penmark Castle dates from the medieval period, and is classified as a castle. It is one of over 32,000 scheduled monuments protected across the UK.
Penmark 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 GM229.
Several scheduled monuments lie within 10 km, including East Orchard Manor House (3.1 km), East Orchard Wood Pillbox (3.2 km), The Bulwarks Camp (3.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Penmark 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.
Penmark Castle stands on Lias Group, bedrock that formed in the Aalenian. The rock here is mudstone, siltstone, limestone and sandstone.