La struttura nascosta. La verosimile ipotesi della Cupola fiorentina: il modello tridimensionale dei mattoni orditi a spinapesce e del loro ordinamento nello spazio

This study in progress about the mysterious story of the Brunelleschi's Dome wants to extract a likely hypothesis of the internal structural configuration of the Florentine Cupola. We know that, despite appearing externally as an octagonal pavilion, this Dome must be seen as generated and built by a rotational geometry. This is evidenced by facts, since the Dome was built without the use of provisional supporting formwork. This study also shows how the always mentioned warping of the bricks, the "herringbone", is part of a spherical vault - double curvature vault. This herringbone should and can be arranged in space according to a three-dimensional structural link that connects three bricks in one convex polyhedron, by using three bricks, and not just two, as this kind of warping has always been interpreted, following the tradition. The purpose of this study is to highlight the charm of a work whose construction technology has remained hidden for six centuries, due to a heap of reasons, only partly related to the secrecy of medieval art and its work organization. Rather, this study, and its complete verification in reality, would throw new light on the contradiction of an innovative technology that, to beat down the inertia of traditional construction methods, had to hide itself from the control of its contemporaries.