04/08/2026
Historic & Structural Fun Facts
Ancient Concrete: The Romans were the first to develop concrete, mixing lime, water, and volcanic ash.
Tallest Structure: The Great Pyramid of Giza, built from over 2.3 million blocks of limestone, remained the tallest building in the world for over 3,800 years.
The Moving Tower: The Eiffel Tower can sway during storms and expand or contract up to 7 inches due to heat, as its iron components react to the sun.
Concrete Production: About 6 billion cubic meters of concrete are produced each year, equivalent to one cubic meter for every person on Earth.