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🏰 Windsor: The World's Oldest and Largest Occupied Castle

A 3D cutaway of Windsor Castle showing how the motte-and-bailey plan evolved into the world's oldest continuously occupied royal residence, with an era slider to see architectural changes over time.

Society & Economics3DModerate60 FPS

A 3D cutaway of Windsor Castle showing how William the Conqueror's 1070 timber motte-and-bailey grew into the world's oldest continuously occupied royal residence, with an era slider to step through its architectural history.

🔬 What It Demonstrates

The Round Tower still sits on the original 11th-century motte; the curtain wall follows the same circuit Henry II rebuilt in stone after 1170; St George's Chapel and the Order of the Garter arrive under Edward III; and the Georgian State Apartments reflect Wyatville's 1820s remodel.

🎮 How to Use

Drag the Era slider through 1070, 1170, 1350 and today to watch the wooden fort become a stone royal palace. Toggle the interior cutaway to fade walls and roofs and peer inside the Round Tower, chapel and staterooms.

💡 Did You Know?

Windsor Castle covers about 13 acres and has housed 40 monarchs since 1070, making it both the oldest and the largest occupied castle in the world.

⚙ Under the hood

A 3D cutaway of Windsor Castle showing how the motte-and-bailey plan evolved into the world's oldest continuously occupied royal residence, with an era slider to see architectural changes over time.

HistoryArchitectureHeritageCitiesThree.js

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install