Building the Tower of London: A 400-Year Construction Story

The Tower of London wasn't built — it *accreted*. From William the Conqueror's White Tower (1078) to the 14th-century completion of its concentric defenses, the complex grew across four centuries of royal ambition, fear, and architectural evolution.

Phase 1: The White Tower (1078–1100)

William I started the stone keep — 90 ft (27 m) tall, 15-ft (4.6 m) thick walls, Caen limestone imported from Normandy. Purpose: dominate London, control Thames traffic, house garrison. Completed under Henry I. The name "White Tower" came from whitewash applied by Henry II (1170s).

Phase 2: Inner Ward and Curtain Wall (1190–1285)

• Richard I / John: First curtain wall, ditch, Bell Tower, Develin Tower
• Henry III (1216–1272): Massive expansion — Wakefield Tower, Lanthorn Tower, great hall, kitchens, royal lodgings. Painted decorations, stained glass, plumbing.
• Edward I (1272–1307): Completed concentric defense — outer curtain wall, moat (fed by Thames), 13 new towers (Beauchamp, Devereux, Flint, etc.), Traitor's Gate (water entrance).

Phase 3: Completion and Peak (1300–1400)

By the 14th century, the Tower was a fully functioning triplex: **royal palace, fortress, prison**. The Wharf extended the riverfront. The Mint operated inside. The menagerie (lions, leopards, polar bear) entertained courts. The Crown Jewels found permanent home.

Key Dates

• 1078: White Tower begun
• 1100: White Tower complete
• 1190: First curtain wall
• 1240: Henry III's palace buildings
• 1285: Edward I's outer wall complete
• 1300: Concentric fortress finished
• 1377–1399: Richard II's improvements (last major medieval work)

Post-Medieval

Tudors added little (Henry VIII's timber lodgings burned). Stuarts used it as arsenal/prison. Wren rebuilt the Grand Storehouse (1688). 19th century: Waterloo Barracks (now Crown Jewels), moat drained (1843), tourism begins.

The Tower was never "finished" — it was continuously adapted. What stands today is a 900-year palimpsest of power, fear, and stone.