Castle-Breaking: Deliberate Destruction of Fortifications

Castle-breaking (slighting) is the intentional dismantling or destruction of a castle to eliminate its military utility.

Historical Reasons

• Prevent enemy reuse: Conquerors slight captured castles so they can't be retaken.
• Centralize power: Monarchs destroy baronial castles to curb rebellion (e.g., Henry II in England, Richelieu in France).
• Post-conflict demilitarization: Treaties mandate slighting (e.g., post-English Civil War: Parliament ordered many royalist castles slighted).
• Economic: Avoid garrison costs; reuse stone for building.

Methods

• Demolish walls, towers, keep—often just key structural elements (corners, gatehouses).
• Fill ditches, breach curtain walls.
• Remove floors, roofs, lead, timber.
• Gunpowder (later periods) for efficient collapse.

Famous Examples

• Corfe Castle (England, 1646)
• Kenilworth Castle (England, 1650s)
• Château Gaillard (France, 1603)
• Heidelberg Castle (Germany, 1689/1693)

Many "ruins" today are deliberately slighted, not just time-worn.