when the man became her lover, but after the death of Galeazzo Maria quickly acquired great power and enormous influence over Bona, thus becoming a personal enemy of Cicco. After the death of Sforza Maria, perhaps poisoned by Bona herself and Simonetta, Antonio Tassino persuaded his lover to grant his other brother-in-law, Ludovico, the return to Milan, in the hope that this would be enough to free him from the uncomfortable presence of Cicco. Bona accepted his request and on 8 September, reconciled with his brother-in-law, effectively condemning the faithful Cicco Simonetta to the death penalty.The sentence pronounced by Cicco Simonetta could only be true: although she still officially remained the regent, assisted by the new ducal chancellor Bartolomeo Calco, Ludovico il Moro had the political situation of the State in his hands. On 7 October 1480, in fact, Ludovico, under the pretext of protecting the life of his nephew from the aims of Antonio Tassino, had him transported to the "Rocchetta", the most impregnable area of the Castello Sforzesco, then forced his sister-in-law to fix the sentence to exile for Antonio Tassino and his family, who had to return to their homeland in Ferrara. Due to the forced separation from her lover, Bona began to show signs of hysteria. She demanded to leave the duchy and return to Piedmont or France, where she had grown up, and threatened suicide when Ludovico and Roberto Sanseverino tried to prevent her, so that the two were forced to give in. So Bona signed the formal renunciation of the regency of his son and left for France, but at the insistence of the little son he was then content to stop and live in the castle of Abbiategrasso, with a retinue consisting mainly of moro spies. The little Gian Galeazzo signed a document with which he proclaimed his uncle tutor in place of his absent mother, as it was arranged in the will of the deceased Galeazzo Maria in the event that Bona had not wanted or could not take responsibility for the regency. Ludwig thus concentrated almost all political power in his own hands. Bona of Savoy commissioned the Sforza Book of Hours, which was painted in about 1490 by a famous court artist, Giovan Pietro Birago. She used the book, which contained devotional texts and is considered to be one of the most outstanding treasures of the Italian Renaissance. Issue Gian