10 March 1534, following the suggestions of Pope Clemente VII, duca Alexander dei Medici wrote one “letter of commission” to Antonio from Sangallo il giovane: “I wish that you come to Florence in order to be worth of council ET opra yours to me approximately to sure my purpose, which to bocha I will say to you, but me you will be pleasing how much before possete you will not lack in end here”.
The “purpose” to say “to bocha” was the construction of the Fortress of Saint Giovanni, said “downstairs”. Between the May and the July of that year the person in charge of the work was formalized staff: the Sangallo like “caput magistrorum fortilitii”, Giovanni Alessio - said Nanni the Unghero- “capomaestro” of the factory, the captain of the guards Alexander supervising Vitelli and Pierfrancesco from Viterbo like.
Imposing the number of the laborers: beyond 1500, it obligates to you to even work “also the festivity days and Passover”. Enormous expenses, with the fiorentini forced to pay “accatto”. A ciclopica enterprise, even if the historical vicissitudes did not allow to the fulfillment of the citadel second the plans originate them.