
Lenoard and its idea to lift up the Baptistery
asari writes in 1550 about Leonardo: «And among these models and drawings there was one, with which several times ingenious citizens who then governed Fiorenza, showed wanting to raise the temple of San Giovanni di Fiorenza, and submit the stairs there without rearing it; And with so strong reasons it persuaded him, who seemed possible, although each, then that he had started, knew for himself the impossibility of a cotant company ". In reality, Leonardo's project already had precedents: a few years earlier, in 1455, the Bolognese engineer and architect Aristotile Fioravanti (c. 1415-1486) with rollers, beams and Martinetti, had successfully moved a tower in Bologna . The latter had among other things worked for Leonardo's friends or clients, such as the Bentivoglio, King Mattia Corvino of Hungary and Cosimo de ’Medici (between 1458 and 1467 in Florence). Leonardo's project provided to raise the baptistery on four steps, as can be seen in a design attributed to Francesco Granacci (which is preserved in the cabinet drawings and prints of the Uffizi)








