https://www.lwltv.com/subjects/436056598859808767 From PBS - The dome that crowns Florence's great cathedral of Santa Maria del Fiore -- the Duomo -- is a masterpiece of Renaissance ingenuity and an enduring source of mystery. Still the largest masonry dome on earth, it is taller than the Statue of Liberty and weighs as much as an average cruise ship. Historians and engineers have long debated how its architect, Filippo Brunelleschi, kept the dome perfectly aligned and symmetrical as the sides rose and converged toward the center. More than four million bricks could collapse at any moment -- and we still don't understand how Brunelleschi prevented it. To test the latest theories, a team of U.S. bricklayers will help build an experimental "mini-Duomo" using period tools and techniques. https://www.lwltv.com/subjects/436056598859808767 https://img.lwltv.com/YrSWDeR9ZRtKQcAA7tOl2ehwk3Q=/144x0/images/2aSW0MrGj37qGOcJfMaXoHjD72K.jpg 144 zh-cn Sun, 13 Nov 2022 20:31:31 +0800 Sun, 13 Nov 2022 20:31:31 +0800 180 LWLTV RSS Generator 1.0 https://www.lwltv.com/subtitles/442795809931591679 Sun, 13 Nov 2022 20:31:31 +0800 MOVIE MOVIE https://www.lwltv.com/subtitles/442795809931591679 44455 https://www.lwltv.com/subtitles/442795809931591679