Notre-Dame de Paris: How Medieval Engineers Built the World's Most Famous Cathedral Over 182 Years

In 1163, Bishop Maurice de Sully broke ground on a cathedral that would take 182 years to finish — pioneering the flying buttress, suspending 1,300 oak beams in a forest above the nave, and surviving revolution, war, and fire to reopen in December 2024.

A daily 1-minute video series uncovering how the world's most iconic structures were built — from ancient wonders to modern skyscrapers.