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THE CORRECT ANSWER: Construction without central scaffolding thanks to laying fishbone bricks

In the 15th century, the dome of Florence represented an insurmountable architectural challenge due to its diameter of 45 meters.Filippo Brunelleschi revolutionized engineering by designing a self-supporting dome, thus eliminating the need for solid wood scaffolding, which was then technically impossible to achieve. Its secret lay in a lightweight double shell and a unique masonry method: the bricks were arranged in a “fishbone” (spina di pesce).This technique made it possible to lock the elements together as the elevation progressed, transferring the weight towards the vertical structures rather than towards the center. This Renaissance masterpiece, completed in 1436, remains the largest masonry dome in the world.It bears witness to the genius of Brunelleschi who, without training as a classical architect, was able to rediscover and surpass ancient techniques to create an icon of elegance and robustness.