Medieval Spiral Staircases and the Clockwise Defense Myth

The popular claim that medieval castle spiral staircases were built clockwise to give right-handed defenders a sword-swinging advantage is a myth with no primary evidence. The idea is that attackers climbing clockwise stairs would have their sword arm (right hand) pressed against the central pillar, restricting their swing, while defenders above could swing freely. The evidence contradicts this: - Approximately 30% of surveyed castles have counter-clockwise stairs, far too many for a supposedly universal defensive feature - Clifford's Tower in York has staircases running in both directions within the same structure - The Tower of London uses counter-clockwise stairs in several towers - Staircases are poor fighting environments regardless of direction — the narrow confines restrict movement for both attacker and defender - Historical sieges rarely involved staircase combat; castles fell through siege, starvation, betrayal, or breaching walls, not sword fights on stairs The myth is traceable to Sir Theodore Andrea Cook, an Edwardian writer whose speculation was repeated uncritically for over a century until it became accepted as fact. More likely reasons for the prevalence of clockwise construction include right-handed handrail ergonomics (most people prefer gripping with the right hand when ascending), stonemason convention, and simple architectural habit passed between builders.