According to Tom Mueller the questions the fathers of Florence asked were, “Could a dome weighing tens of thousands of tons stay up without them? Was there enough timber in Tuscany for the scaffolding and templates that would be needed to shape the dome's masonry? And could a dome be built at all on the octagonal floor plan dictated by the existing walls -- eight pie-shaped wedges -- without collapsing inward as the masonry arced toward the apex?”
The significance of the discovery of his out of the box thinking is that Brunelleschi was