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Of all the visible changes the Normans made to England, the castle was the most conspicuous and the most durable. By 1100 England had around five hundred castles where, in 1066, it had fewer than a dozen. Many of those early castles decayed within a century; dozens became stone fortresses that survive today; a handful — the Tower of London, Rochester, Dover, Durham, Hedingham — still dominate their landscapes nearly a thousand years later. But the castle was only one part of a wider Norman legacy: a shared aristocratic Channel-culture, a transformed language, a feudal law of land tenure that lasted into the nineteenth century, a parish and cathedral architecture that still shapes the English countryside, and a common law whose foundations were laid in Norman royal justice.
This lesson examines castles in detail — design, purpose, and evolution — and then sets out the broader legacy of the Norman Conquest: linguistic, legal, ecclesiastical, and political. Edexcel Q4(c)/(d) questions increasingly ask candidates to reach a judgement on the Conquest's overall importance, and that requires a clear sense of what actually lasted.
The characteristic early Norman castle was the motte-and-bailey. A motte was an earthen mound, typically 5 to 20 metres high and 30 to 100 metres across at the base. On its flat top stood a wooden tower (the keep), reached by a bridge or steep stair from the bailey. The bailey was a larger enclosed courtyard at the foot of the motte, surrounded by a ditch, an earthen bank, and a wooden palisade. Within the bailey stood the hall, kitchens, stables, chapel, workshops, and garrison accommodation.
graph TD
M[Motte: earthen mound] --> T[Timber tower: lord's residence]
B[Bailey: enclosed courtyard] --> H[Hall]
B --> S[Stables]
B --> C[Chapel]
B --> W[Workshops]
B --> G[Garrison quarters]
P[Palisade + ditch] --> B
The key feature of the motte-and-bailey was speed. With a workforce of several hundred labourers — mostly conscripted English peasants — a motte could be thrown up in a week or two and a wooden palisade completed in a month. William's first castle at Hastings, prefabricated in sections in Normandy, was assembled within days of his landing. This made it possible to garrison a rebellious county within weeks of conquest, rather than years.
The labour required was considerable and borne by the local population. Domesday records entire villages demolished to make way for castles (166 houses at Lincoln, 51 at Shrewsbury, 98 at Norwich). Conscription for castle-building was a distinct Norman grievance recorded in contemporary English sources. The Anglo-Saxon Chronicle in 1086 laments that the Normans "filled the country full of castles" and "oppressed the poor people with castle-work".
Castles were sited with care. Within towns, they commanded the marketplace and the main roads. In the countryside, they controlled river crossings, coastal landings, frontier passes, and routes between earldoms. On the Welsh Marches and the Scottish border they were strung along the frontier — Chepstow, Monmouth, Shrewsbury, Chester, Carlisle, Newcastle — creating zones of controlled aggression against still-unconquered neighbours.
Wooden motte-and-bailey castles had two weaknesses: they rotted, and they burned. By the 1070s, at strategically important sites, William and his magnates began to replace timber with stone. A stone keep required a different type of motte (mottes could not support the weight of a stone tower; keeps therefore sat either on natural rock or on specially constructed platforms) and much greater expense. A stone castle announced that Norman rule was permanent.
The White Tower at the Tower of London was begun c. 1078 under the direction of Gundulf, Bishop of Rochester. Its Caen stone (imported from Normandy), its walls up to 4.6 metres thick, its four storeys, its internal chapel of St John, and its 27.5-metre height made it the largest secular building in England for more than a century. The White Tower was a royal residence, a prison, an armoury, and above all a symbol: a Norman keep at the heart of England's largest city.
Other great stone keeps followed over the next century — Rochester (begun 1127), Hedingham (c. 1140), Dover (begun 1180 under Henry II). Durham Castle, though founded by William and occupied throughout his reign, received its massive stone keep later. The earliest generations of stone castles drew directly on the Norman ducal tradition of such keeps as Arques-la-Bataille and Falaise.
| Castle | Type | Earliest stonework | Strategic role |
|---|---|---|---|
| Tower of London | Royal keep | c. 1078 | Dominates the City of London |
| Rochester | Royal keep | 1087 (curtain); 1127 (keep) | Guards road London–Dover |
| Dover | Royal keep | c. 1180 (re-fortified) | Channel gateway |
| Durham | Royal/episcopal | from c. 1072 | Northern frontier, seat of bishop |
| Windsor | Royal | from c. 1070 (motte); stone later | Thames defence, royal residence |
| Chepstow | Marcher | 1067 (stone hall, very early) | Welsh Marches |
Norman castle architecture drew on Romanesque principles: round arches, massive square keeps, thick walls, small windows, and internal chapels in Caen-stone with cushion capitals. By the twelfth century, shell-keeps (round stone walls on top of mottes), curtain walls with mural towers, and concentric layouts had all developed from the basic Norman template.
A Norman castle had three overlapping functions.
The castle was primarily a garrison base. Twenty or thirty armed men could hold a motte-and-bailey against hundreds of attackers because attackers had to cross open ground and climb earthworks under fire. Relief forces could use castles as forward bases; rebels could rarely invest them quickly enough to starve out a garrison before a royal army arrived.
The castle was also the local centre of lordship. The lord's steward collected rents, the reeves reported from outlying manors, the manor court might meet in the bailey, the sheriff held the shire court in the castle hall if the castle was royal. Tax receipts (the geld collected in coin) were stored in the keep. Records were kept there. In an illiterate countryside, the castle was where power took written form.
Finally, the castle was the lord's residence. Norman aristocratic life — feasting, hunting, worship in the chapel, display of the lord's wealth and banner — took place within the castle walls. For the lord's household, the castle was a home as well as a fortress, and later medieval developments (larger halls, bigger windows, gardens) reflected the gradual ascendance of comfort over defence.
The genius of the Norman castle was that it combined all three functions. Earlier fortifications — Roman forts, Anglo-Saxon burhs — were communal defences without continuous lordly residence. Later palaces would separate residence from fortress. For about two centuries, 1066 to roughly 1300, the castle held all three roles together, and that made it the characteristic institution of Norman and Angevin government.
On the Welsh and Scottish borders, castles were strung like a chain. William fitzOsbern at Chepstow, Roger of Montgomery at Shrewsbury, Hugh d'Avranches at Chester, and later royal castles at Carlisle and Newcastle, transformed previously porous frontiers into militarised zones from which Norman expansion into Wales and southern Scotland would be launched in the following generation.
Within England, compact "castleries" gave a single tenant-in-chief the rape of Pevensey (Robert of Mortain), the honour of Richmond (Alan of Brittany), the honour of Tutbury (Henry de Ferrers), and similar concentrated territories. These blocs made defensive coordination easier for the Crown in some regions and dangerous in others — the 1075 Revolt of the Earls drew its strength from such compact Norman holdings.
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