Castles Arrive in England: The Norman Conquest of 1066

Castles were introduced to England immediately after the Norman Conquest of 1066. William the Conqueror and his followers built the first true castles — motte-and-bailey fortifications — to secure their hold on a hostile population of 1.5–2 million Anglo-Saxons with only ~8,000–10,000 Norman knights and retainers.

Timeline

• 1066 (Oct–Dec): Hastings → London submission. William orders rapid castle construction at strategic nodes: London (Tower of London begun 1070s), Winchester, Windsor, Dover, Canterbury, York, Norwich, Lincoln, Nottingham, Cambridge, Warwick, Exeter.
• 1067–1087: ~500–600 motte-and-bailey castles erected across England. Domesday Book (1086) records many.
• 12th Century: Stone replacement begins (White Tower, London; Colchester; Rochester; Hedingham). Square keeps → shell keeps → round towers.
• 13th Century: Concentric castles (Edward I in Wales: Caernarfon, Conwy, Harlech, Beaumaris) — peak military architecture.

Motte-and-Bailey Anatomy

• Motte: Artificial earth mound (5–30 m high), topped by timber (later stone) tower (keep) — last redoubt.
• Bailey: Enclosed courtyard (palisaded, ditched) — hall, kitchen, stables, barracks, chapel.
• Ditch & Palisade: Perimeter defense; sometimes wet moat.
• Build Time: Weeks to months (earth/wood). Stone keeps: years.

Functions Beyond Defense

• Administration: Sheriff's court, tax collection, royal officers.
• Symbolism: Visible projection of Norman authority — "architecture of intimidation."
• Economy: Market rights, mill control, trade tolls.
• Residence: Lord's household, retinue, garrison.

Pre-Norman Fortifications

Anglo-Saxons built burhs (fortified towns, Alfred's network) and ringworks (earthwork enclosures without motte) — but no private, towered, feudal castles. The castle was a Norman import.

By 1100, England was the most castellated country in Europe — a landscape of power written in earth and stone.