The document discusses the Industrial Revolution and Big Ben. It describes how the Industrial Revolution in the late 1700s revolutionized building materials and allowed for stronger, taller structures. It then focuses on Big Ben, the iconic clock tower in London completed in 1859. Big Ben served as one of the most accurate clocks during the Industrial Revolution, playing an important role in ensuring trains and workers were on time. It became a symbol of Britain's industrial and technological advancement. The construction of Big Ben also drove innovations in building techniques that paved the way for modern skyscrapers.