- The tower where Big Ben is located is officially known as "Elizabeth Tower." It was completed in 1859.
- The 15-minute chimes on Big Ben have lyrics: "All through this hour / Lord be my guide / And by Thy power / No foot shall slide."
- In August, 2015, Big Ben's Clock was discovered to be running 6 seconds fast, and coins were removed from its pendulum to correct the error.
- The Liberty Bell and Big Ben were cast by the same bell foundry and both bells are cracked.
- During WW2, the lights of Big Ben were dimmed so that German bombers could not use it for reference.
- Turning back the giant hands on Big Ben's four clock faces takes an incredible 5 hours in total.
- Clocksmiths climb the 334 stairs of the Elizabeth Tower 3 times a week to wind Big Ben's clock, whose timing can be affected by the weather, atmospheric pressure or simply by being 156 years old.
- For 2 years during WW1, the Big Ben's bells were silenced and the clock was not illuminated at night to avoid guiding attacking German Zeppelins.
- The company which maintains Big Ben has staff on 24-hour call should something go wrong.
- In 1949, a flock of starlings perched on the minute hand of Big Ben, slowing it by 4.5 minutes.