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Grosmont Castle

WLS Wales · 11th century

Grosmont Castle in Wales
Photo: Robert Cutts from Bristol, England, UK · CC BY 2.0 · Wikimedia Commons

Grosmont Castle is a ruined castle in the village of Grosmont, Monmouthshire, Wales. The fortification was established by the Normans in the wake of the invasion of England in 1066, to protect the route from Wales to Hereford. Possibly commissioned by William FitzOsbern, 1st Earl of Hereford, it was originally an earthwork design with timber defences. In 1135, a major Welsh revolt took place, and in response King Stephen brought together Grosmont Castle and its sister fortifications of Skenfrith and White Castle to form a lordship known as the "Three Castles", which continued to play a role in defending the region from Welsh attack for several centuries.

King John gave the castle to a powerful royal official, Hubert de Burgh, in 1201. During the course of the next few decades it passed back and forth between several owners, including Hubert, the rival De Braose family, and the Crown. Hubert rebuilt the castle in stone, beginning with a new hall and then, on regaining the property in 1219, adding a curtain wall, gatehouse and mural towers. In 1233, a royal army camped outside the castle was attacked by rebel forces under the command of Richard Marshal. Edmund, the Earl of Lancaster, gained possession of the castle in 1267, and it remained in the hands of the earldom and later Duchy of Lancaster until 1825.

Edward I's conquest of Wales in 1282 removed much of Grosmont Castle's military utility, although it was besieged in 1405 during the Glyndŵr Rising. By the 16th century it had fallen into disuse and ruin. The castle was placed into the care of the state in 1922, and is now managed by the Cadw Welsh heritage agency.

Text adapted from “Grosmont Castle” on Wikipedia, CC BY-SA 4.0.

Grosmont Castle ranks #2,767 of 7,738 worldwide in the atlas's castle fame ranking, and #49 of the 100 mapped in Wales. Founded 1066, it is older than 89% of the atlas's dated landmarks — one of 317 atlas entries founded in the 11th century. 14 more atlas landmarks stand within 25 km. The nearest day-trip guide is Cardiff, 53 km away. See how Wales compares in the castle statistics.

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Frequently asked questions

Where is Grosmont Castle?

Grosmont Castle stands in Wales, at 51.91541°, -2.86565°.

When was Grosmont Castle built?

The atlas dates its founding to 1066. Earlier structures may have stood on the site; this is the earliest documented founding year.

How famous is Grosmont Castle?

In this atlas's fame ranking: #2,767 of 7,738 worldwide, and #49 in Wales. Fame here combines how many Wikipedia language editions cover a landmark with how many people read them.

What is the nearest castle to Grosmont Castle?

Ewyas Harold Castle, about 5 km away.

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