Wales · Partial ruin
Castell Dinas
Castell Dinas is an Iron Age hillfort later reused as a Norman stone castle on a high summit in southern Powys, Wales. The site combines concentric prehistoric earthworks with the footprint of a medieval hall-keep, curtain walls, and a gatehouse; only low walls, earthworks and a short gatehouse fragment survive today. It occupied a commanding position above the Rhiangoll pass between Talgarth and Crickhowell and was finally destroyed in the early 15th century.
Its prime
1235
Today
Partial ruin
As it stood in 1235
The shape it held in its prime.
Perched on a rounded 450 m summit, the site reads as concentric terraced banks and ditches forming an oval hillfort with an inner bailey at the highest point. At the centre is the squared footprint and rubble of a stone hall-keep; low, turf-covered curtain-wall scars and scattered stone rubble mark former wall lines and square tower positions. A fragmentary gatehouse and postern occupy the northern outer ward; grassy slopes fall away to pasture and hedgerows below.
Its story
The story of Castell Dinas.
Castell Dinas began as an Iron Age hillfort, its concentric prehistoric earthworks later reused when a fortified Norman castle with stone walls was built on the summit — possibly by William Fitz Osbern or his son Roger de Breteuil, Earl of Hereford, between 1070 and 1075. At 450 metres it is the highest castle in England and Wales, positioned to defend the Rhiangoll pass between Talgarth and Crickhowell.
The castle remained part of the barony of Brecon until 1207, when King John granted it to Peter FitzHerbert. Finally destroyed in the early 15th century, the site preserves the footprint of a medieval hall-keep, curtain walls and a gatehouse, though only low walls, earthworks and a short gatehouse fragment survive today.
Step inside
8 places to explore in 1235.
The record describes 8 distinct spots at Castell Dinas — including 1 interior: interior of the hall-keep. Create your own photoreal reconstruction and walk through every one — more scenes means more photos, more angles and more rooms of the immersive experience.
Create History
Recreate Castell Dinas with AI to explore it.
The artist rebuilds it as it stood in 1235 — a photoreal walk that belongs to you alone. Pay with coins, no subscription needed.
Recreate Castle to Explore →Whose castle
Clans who held Castell Dinas.
The families that held Castell Dinas for a decade or more across its history — follow a name to its clan.
FitzHerbert
Granted to Peter FitzHerbert by King John in 1207.
