History of Pevensey Castle

Pevensey Castle’s impressive ruins stand on what was once a peninsula projecting from the Sussex coast. This naturally defensible site, first fortified by the Romans, was most famously the place where the Norman Conquest of England began, when William the Conqueror landed there on 28 September 1066. He built temporary defences at Pevensey, probably within the Roman fort, and later a great medieval castle developed inside its walls.

Gold coin of Carausius (r. AD 286–93), showing him crowned as emperor. He may have begun to build Pevensey after declaring independence fom central Roman rule
Gold coin of Carausius (r. AD 286–93), showing him crowned as emperor. He may have begun to build Pevensey after declaring independence fom central Roman rule
© Trustees of the British Museum

The Roman Fort

We know little about the early history of Anderida, the Roman fort at Pevensey. Tree-ring dating of wooden piles sunk into the wall foundations suggests that it was built in about AD 290.[1]

At that time the coastal defences of Roman Britain seem to have been systematically strengthened, and a number of other forts around the south and east coasts, such as Portchester, Burgh, Richborough and Lympne, were built or reconstructed. These share many architectural features with Pevensey, particularly the D-shaped wall towers which were a new feature of Roman fortifications at this time.

One explanation for this sudden burst of building activity is the usurpation of Roman rule in Britain between AD 286 and 296 by the military commander Carausius and his successor, Allectus. Both were self-proclaimed emperors of Britain and parts of Gaul (France), and had a strong motive to fortify the coast against reconquest by the central Roman government. Coins of this period have been found in the wall foundations.[2] However, when the Emperor Constantius invaded Britain in 296 there is no indication that the coastal forts, including Pevensey, played a part.

A reconstruction drawing showing how the Roman fort at Pevensey may have looked in about AD 300
A reconstruction drawing showing how the Roman fort at Pevensey may have looked in about AD 300. Although the sea is now a mile away, at this time it came right up to the walls in some places
© Historic England (illustration by Peter Urmston)

Anderida is first documented a late Roman document, the Notitia Dignitatum, which lists all civil and military posts in the Roman empire.[3] It was one of nine forts around the south and east coasts commanded by the Comes Litoris Saxonici per Britanniam, or the ‘Count of the Saxon Shore’. Whether or not these forts were established as a coherent defensive system is not clear, but some may have had naval detachments, working also with ships based at coastal forts in northern France. The Notitia mentions a fleet, the classis Anderidaensis, which took its name from Anderida. The date and circumstances of compilation of the western empire section of the Notitia are uncertain but it usually regarded as late 4th or early 5th century, though some out-of-date information may have been included.

After the withdrawal of Roman troops from Britain in the early 5th century, Anderida’s walls continued to shelter a community. The Anglo-Saxon Chronicle records that in 471 the fort was besieged and its population slaughtered by Saxon raiders.[4] 

The fort was abandoned for around a century before it was inhabited again. Little is known about it in Anglo-Saxon period, though traces found by archaeologists such as fragments of glass suggest it was a high-status place. It may even have acted as a royal centre.

Read more about the Saxon Shore forts
A reconstruction drawing showing the Norman fleet landing at Pevensey Bay in September 1066
A reconstruction drawing showing the Norman fleet of 700 ships landing at Pevensey Bay on the morning of 28 September 1066
© Historic England (illustration by Peter Urmston)

The Norman Landing

Pevensey’s history changed dramatically when, before dawn on 28 September 1066 – three days after King Harold’s victory at Stamford Bridge – William, Duke of Normandy, sailed his invading fleet of about 700 ships into the Bay of Pevensey. After landing, he immediately built a temporary fortification, almost certainly within the walls of the Roman fort, to shelter his troops.[5] He cut a ditch across the peninsula to isolate the ruins from the mainland and repaired the walls to create a castle.

The next day William marched his army away along the coast to Hastings, and waited for Harold to arrive from the north – in the meantime pillaging and burning the surrounding countryside. His subsequent victory over King Harold at the Battle of Hastings and coronation as King of England heralded a new era in English history.

A scene from the Bayeux Tapestry depicting Robert, Count of Mortain (right), and his brother Odo, Bishop of Bayeux (left), sitting on either side of William, Duke of Normandy
A scene from the Bayeux Tapestry depicting Robert, Count of Mortain (right), and his brother Odo, Bishop of Bayeux (left), sitting on either side of William, Duke of Normandy
© By Myrabella (Own work) [Public domain or CC0], via Wikimedia Commons

The Norman Castle

When William left England in 1067 to make a triumphal tour of Normandy, he chose to sail from Pevensey. He seems to have made a show while at Pevensey of distributing lands to his victorious followers, before a collected body of defeated Anglo-Saxon nobles. It was probably on this occasion that he gave the castle with its hinterland, known as the ‘Rape’ of Pevensey, to his half-brother Robert, Count of Mortain (d.1095).

Pevensey offered a natural anchorage facing the Normandy coast, and any castle with command of this was of obvious strategic importance. Control of it not only ensured lines of communication with the Continent, but prevented it from being used as the base for another seaborne invasion. It was probably Robert who created the first permanent defences, refortifying the Roman perimeter wall and creating two enclosures (or baileys) within it, divided by a ditch and a timber palisade.

In 1088, the year after William’s death, Pevensey’s strategic importance was demonstrated again during the war between his eldest son, Robert Curthose, who succeeded William as Duke of Normandy, and Robert's younger brother William Rufus, who succeeded to the English throne. When an attempt was made to make Robert king of England in William's place, the Count of Mortain and his brother Odo, Bishop of Bayeux, supported Duke Robert and held Pevensey Castle against the king.

Miniature of Henry I, from an early 14th century manuscript
Miniature of Henry I, from an early 14th-century manuscript. Henry was at Pevensey in the summer of 1101 to defend it against the threat of invasion by his elder brother Robert, Duke of Normandy
© British Library (Cotton Claudius D.ii fol 45v; public domain, via Wikimedia Commons)

There was a real danger that Robert would invade England in the footsteps of his father. To prevent this, William Rufus personally led a siege of Pevensey by land and sea. The castle’s powerful defences resisted every assault, but after six weeks food was running short, and with no prospect of reinforcements from Robert the rebels agreed a truce.

Despite this rebellion the Count of Mortain was allowed to keep Pevensey. But his son subsequently lost it, along with the other family estates in England, as a result of his opposition to William Rufus’s successor and younger brother, Henry I (r.1100–35). Henry granted most of this confiscated property to a Norman lord, Gilbert Laigle.

Nevertheless, the castle seems to have been retained in royal hands for security. In 1101, when Duke Robert again threatened to invade England, Henry I spent the summer at Pevensey in anticipation of an attack.


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The gatehouse to the inner bailey at Pevensey Castle, probably built in about 1200. The causeway and drawbridge pit are later medieval additions
The gatehouse to the inner bailey at Pevensey Castle, probably built in about 1200. The causeway and drawbridge pit are later medieval additions

The Development of the Castle

During King Stephen’s reign (1135–54) the Laigle family lost possession of Pevensey, and the castle was granted to Gilbert de Clare, 1st Earl of Pembroke. When Gilbert rebelled in 1147 Stephen blockaded the castle until its inhabitants were starved into submission.[6] The Crown then directly repossessed it.

Royal records of repairs made to palisades in the 1180s suggest that at this date, aside from the Roman walls, Pevensey’s defences were still largely of earth and timber.[7] The first major stone buildings may date from the 1190s, when regular and substantial payments were made towards unspecified works by Richard I (r.1189–99).[8] He may have built the keep and the gatehouse, although the ruins of the former could belong to a ‘Tower of Pevensey’ described in 1129–30.[9]

The castle Richard developed may have been deliberately destroyed during the turbulent reign of his successor, John (r.1199–1216). By 1216 he was desperately fighting off an invasion led by the French king’s son, Prince Louis, and as he retreated through Sussex he gave orders to destroy the castles of Pevensey and Hastings (an act known as ‘slighting’). Though the castle played no part in Louis’ invasion, it is uncertain whether John’s orders were ever followed.

A 14th-century illustration of a castle under siege
A 14th-century illustration of a castle under siege
© British Library Board (Royal 16 G.VI fol 388)

Baronial Conflicts

After 1230 the castle passed to a sequence of royal favourites, including Peter of Savoy, who was granted it in 1246. He was the uncle of Eleanor of Provence, Henry III’s wife. By 1254 Peter had probably replaced the inner bailey's timber defences with the present stone walls and towers. The inner bailey was the heart of the medieval castle with a chapel, a well, a great hall for communal dining, and living quarters, as well as the impressive keep.

These new defences were soon put to the test during the baronial conflicts of Henry III’s reign (1216–72). On 15 May 1264 an army led by Simon de Montfort inflicted a crushing defeat on the king’s forces at the Battle of Lewes, after which the royalist constable of Pevensey was ordered to surrender the castle.

When he refused to do so, a siege ensued. In September local knights were called upon to help stop the garrison raiding the surrounding countryside.  Though parts of the Roman outer walls were damaged during the siege, ultimately the castle held out, and the siege was only finally lifted in July 1265, making it the longest siege in medieval England.

Aerial view of the inner bailey at Pevensey Castle
Aerial view of the inner bailey at Pevensey Castle
© By Vicki Burton from United Kingdom (Pevensey Castle, East Sussex) [CC BY-SA 2.0], via Wikimedia Commons

Ruin and Repair

The castle was handed back to Peter of Savoy after the king’s victory at the Battle of Evesham in 1265. On Peter’s death in 1268 it passed to Eleanor of Provence, and then descended as Crown property for about 100 years, often being given to queen consorts as part of their dowry.

Royal accounts from the 1270s onwards show that the buildings were continually on the verge of ruin despite regular and extensive repair.[10] Limited use contributed to their rapid decay, while corrupt officials also played their part. In 1306 the constable Roger de Levelande was accused of breaking up and selling the wooden bridge over the moat, and some ‘warders’ of burning the timber from a disused barn.[11] The cost of repairs was estimated at more than £1,000.[12]

Archaeological excavation has also shown that the keep was partially demolished and rebuilt in about 1325.[13]

Detail from a mid-17th-century engraving of Pevensey Castle by Wenceslaus Hollar – the earliest known view of the castle
Detail from a mid-17th-century engraving of Pevensey Castle by Wenceslaus Hollar – the earliest known view of the castle

Pevensey and John of Gaunt

In 1372 John of Gaunt, Duke of Lancaster, took ownership of Pevensey. He refused to garrison the castle against French attacks in 1377, claiming that if it were destroyed he had enough money to rebuild it. Such actions fuelled his unpopularity and in 1381, during the Peasants’ Revolt, a mob broke into the castle, burnt the court records held there, and attacked Gaunt’s steward.[14]

In 1394 Gaunt appointed Sir John Pelham (d.1429) as constable of Pevensey. Pelham supported Gaunt's banished son, Henry Bolingbroke, when the latter returned from exile to claim his inheritance in 1399 and to usurp Richard II (r.1377–99).

After Bolingbroke landed, Pelham held Pevensey on his behalf. On 25 July 1399 Pelham wrote to Bolingbroke reporting that he was under heavy siege by local levies from three counties, and asking him ‘to give remedy to the salvation of your castle’.[15] His gamble in supporting Bolingbroke paid off: when Henry was crowned king as Henry IV, he granted Pelham the castle and honour of Pevensey in reward for his services.

Later History

American soldiers at Pevensey Castle during the Second World War

American soldiers at Pevensey Castle during the Second World War © David E Scherman/The LIFE Picture Collection/Getty Images

During the 15th century the castle became a state prison. Among those held there were James I, King of Scotland, and Joan of Navarre, the second wife of Henry IV, who was accused by her stepson Henry V of plotting his death by witchcraft. Under the Tudors the castle fell out of use altogether, and a survey of 1573 records that the buildings were totally ruined.[16] The threat of the Spanish Armada (1588) led to the construction of a gun emplacement in the outer bailey armed with two cannons, one of which survives at the castle.

After centuries of decay, in 1925 the castle’s then owner, the Duke of Devonshire, gave the site to the State and it was repaired as a historic monument.

The events of the Second World War gave a strange twist to Pevensey Castle’s history. After the fall of France in 1940, Pevensey once more became a potential landing place for an invasion. A command and observation post was set up, the perimeter defences were refortified, pillboxes for machine-gun posts were built, and a blockhouse (for anti-tank weapons) was constructed in the mouth of the Roman West Gate. The towers of the inner bailey were refitted as barracks for the garrison, which included the Home Guard, British and Canadian soldiers and US Army Air Corps units.

The Ministry of Works supervised these alterations to ensure the new work blended with the old (and so was camouflaged). After 1945 the townspeople of Pevensey petitioned for the new works to be left in place as a monument to this important episode in the castle’s history.


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    M Fulford and S Rippon, Pevensey Castle, Sussex: Excavations in the Roman Fort and Medieval Keep, 1993–95 (Salisbury, 2011), 97.
    Ibid, 60.
    Bodleian Library, University of Oxford, MS Canon Misc 378, fol 153v.
    M Swanton (ed and trans), The Anglo-Saxon Chronicles (London, 1996), 15.
    Ibid, 199.
    LF Salzmann, ‘Documents relating to Pevensey Castle’, Sussex Archaeological Collections, 49 (1906), 3 (accessed 22 Jan 2016).
    Ibid, 3–4.
    A Chapman, ‘The gatehouse of Pevensey Castle’, Sussex Archaeological Collections, 145 (2007), 114.
    Pipe Roll 31 Henry I; Salzmann, op cit, 2.
    Salzmann, op cit, 9–17.
    Ibid, 16–17.
    Fulford and Rippon, op cit, 128.
    Salzmann, op cit, 22.
    S Walker, ‘Letters to the Dukes of Lancaster in 1381 and 1399’, English Historical Review, 106 (1991), 75–9.
    The National Archives (TNA), DL 44/224: survey of the state of Pevensey Castle with estimates of the cost of making sea walls in Pevensey Marsh, Sussex.