Pembroke Castle is a medieval castle

Castle

A castle is a type of fortified structure built in Europe and the Middle East during the Middle Ages by European nobility. Scholars debate the scope of the word castle, but usually consider it to be the private fortified residence of a lord or noble...

 in Pembroke

Pembroke, Pembrokeshire

Pembroke is an historic settlement and former county town of Pembrokeshire in west Wales. The town and the county derive their name from that of the cantref of Penfro: Pen = "head" or "end", and bro = "region", "country", "land", and so it means essentially "Land's End".-History:The main point of...

, West Wales

West Wales

West Wales is the western area of Wales.Some definitions of West Wales include only Pembrokeshire, Ceredigion and Carmarthenshire, an area which historically comprised the Welsh principality of Deheubarth., an area called "South West Wales" in the Nomenclature of Territorial Units for Statistics....

. Standing beside the River Cleddau

River Cleddau

The River Cleddau consists of the Eastern and Western Cleddau rivers in Pembrokeshire, west Wales. They unite to form the Daugleddau estuary, which forms the important harbour of Milford Haven....

, it underwent major restoration work in the early 20th century. The castle was the original seat

Family seat

A seat or family seat is the principal residence of a family. The residence usually denotes the social, economic, political, or historic connection of the family within a given area. Some families took their dynasty name from their family seat , or named their family seat after their own dynasty...

 of the Earldom of Pembroke

Earl of Pembroke

Earl of Pembroke is a title created ten times, all in the Peerage of England. It was first created in the 12th century by King Stephen of England. The title is associated with Pembroke, Pembrokeshire in West Wales, which is the site of Earldom's original seat Pembroke Castle...

.

In 1093 Roger of Montgomery

Roger de Montgomerie, 1st Earl of Shrewsbury

Roger de Montgomerie , also known as Roger the Great de Montgomery, was the first Earl of Shrewsbury. His father was also Roger de Montgomerie, and was a relative, probably a grandnephew, of the Duchess Gunnor, wife of Duke Richard I of Normandy...

 built the first castle at the site when he fortified the promontory during the Norman invasion of Wales

Norman invasion of Wales

The Norman invasion of Wales began shortly after the Norman conquest of England under William the Conqueror, who believed England to be his birthright...

. A century later this castle was given to William Marshal

William Marshal, 1st Earl of Pembroke

Sir William Marshal, 1st Earl of Pembroke , also called William the Marshal , was an Anglo-Norman soldier and statesman. He was described as the "greatest knight that ever lived" by Stephen Langton...

 by Richard I

Richard I of England

Richard I was King of England from 6 July 1189 until his death. He also ruled as Duke of Normandy, Duke of Aquitaine, Duke of Gascony, Lord of Cyprus, Count of Anjou, Count of Maine, Count of Nantes, and Overlord of Brittany at various times during the same period...

. Marshall, who would become one of the most powerful men in 12th-Century Britain, rebuilt Pembroke in stone creating most of the structure that remains today.
The castle is sited on a strategic rocky promontory by Cleddau Estuary.