“The decision that the committee finally arrived at was a controversial one: the winning design was judged to have been provided by an unknown illegitimate twenty-four-year-old goldsmith called Lorenzo Ghiberti. It would take Ghiberti more than twenty years before he was finally satisfied with the bronze doors he produced; and in order to achieve this, he would have to transform the art of bronze-casting, introducing both new methods and new apparatus. This was almost as much a feat of technology as it was a work of art. Strathern, Paul. The Medici (pp. 99-100). Pegasus Books. Kindle Edition. ”