What You See at Big Ben: The Great Bell, the Clock, and the Tower

"Big Ben" is famously the nickname for the Great Bell of Westminster—the 13.7-tonne hour bell inside the Elizabeth Tower at the north end of the Palace of Westminster in London. The name likely honors Sir Benjamin Hall, First Commissioner of Works when the bell was installed (1859).

What Visitors Actually See

• The Tower Exterior: 96-meter (316-ft) Gothic Revival clock tower, completed 1859. Four clock faces (7m diameter), each with 312 pieces of opal glass. Illuminated at night.
• The Clock Mechanism: Designed by Edmund Beckett Denison, built by Edward John Dent. Three-tonne pendulum, gravity-driven, accurate to ~1 second/day. Adjusted by adding/removing pennies on the pendulum.
• The Bells (if on tour): Great Bell (Big Ben, E note) + four quarter bells (G#, F#, E, B) playing Westminster Chimes every 15 minutes.
• Interior (UK residents only, pre-booked): 334-step spiral staircase to belfry and clock room. No elevator.

Common Misconceptions

• "Big Ben" is not the tower (officially Elizabeth Tower since 2012).
• It's not the clock mechanism itself.
• The tower leans 0.26° northwest (50 cm at top) due to ground conditions—monitored but stable.

Visiting

Tours are free for UK residents (booked via MP). Overseas visitors cannot currently tour the interior. The best views are from Westminster Bridge, Parliament Square, or a Thames river cruise. The chimes broadcast daily on BBC Radio 4 at 6 PM and midnight—a beloved national sound.

Big Ben is a bell, but the ensemble—tower, clock, chimes—is a symbol of British parliamentary democracy and engineering precision.