Grosmont Castle

rosmont Castle is situated on top of a hill and cut off from the small town that would of, in the past, been located near it by a deep ditch. The castle is relatively small but very strong. The entrance is through a strong gatehouse that would have been protected by a drawbridge over the ditch. The largest building at Grosmont is large rectangular structure that would have been the setting for the great hall. A smaller square keep is set into the curtain wall to the west and there are three more round towers that take up much of what is left of this defensive wall.

Grosmont castle is one of the 'Three Castles' owned by Hubert de Burgh. The other two castles are White Castle and Skenfrith Castle situated not far away. These three castles in the Welsh Marches were designed to enforce the Baron's control over the local population.


Grosmont Castle Key Facts
CountyMonmouthshire (9 castles)
OwnershipBaronial castle
RemainsNot complete but much survives
Access to siteAt any reasonable time
Outer Defences
MoatA deep ditch cuts the castle off from the surrounding area. The ditch is dry.
TimeRef Rating
TimeRef Comments
There are plent of remains at this castle to make a visit worthwhile. Situated in a picturesque village. Why not try and visit White Castle or Skenfrith Castle while you are in the area.

1201   Hubert de Burgh granted castles
 Hubert de Burgh was granted the three castles of White, Skenfrith and Grosmont in the Welsh Marches by King John. 
1205   William de Braose granted lands
 William de Braose, King John's favourite, was granted the three castles of White, Grosmont and Skenfrith. 
1220   Grosmont Castle building work
 Hubert de Burgh improved the defences at Grosmont Castle, including the gatehouse and towers.[1] 
1233 Nov  Rout of Henry's army
 Henry III's army was camped at Grosmont Castle when they were attacked in the night by a force of Welsh and English rebels. Several of Henry's supporters were captured and the castle was returned to Hubert de Burgh, one of the rebels.[1] 
1254   Henry gives Edward his own lands
 Henry III granted Edward (I) areas of land including Crown lands in Wales, Ireland, the Channel Islands and Gascony. He was also given cities such as Bristol, Stamford and Grantham.These areas were on the edge of Henry's lands and the idea was to give Edward experience of governing lands of his own before becoming king. Edward was granted the three castles in the Marches, Skenfrith, White and Grosmont.[2] 
1405 Spring  Battles of Grosmont and Usk
 English forces fought and defeated Welsh forces in two battles at Grosmont and Usk. Sir John Talbot defeated Glyndwr at Grosmont and Prince Henry forced the Welsh to flee at Usk. Glyndwr's eldest son was captured at Usk and sent to the Tower of London where he died.

Episode: Glendowers Revolt  

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