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Baladassare Cossa is elected Pope John XXIII with financial support from the Medici bank, run by Giovanni Medici and his son, Cosimo. This was the first major event that led to the Medici's becoming one of Florence's most prestigious families. The exact date of this is unknown.
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The Medicis formed a ruthless alliance wih the church. 10% of all fundings earned by the townsfolk was collected and paid to the church in accordance to their rules. Anyone who couldn't pay was deemed "sinful", "unpure" and "a manifestation of the devil" or in other words, excommunicated. Again, the exact dates are unknown.
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Piero is the first born child to Cosimo and heir to the Medici's vast fortune.
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Prime architect for the Medici's, Brunelleschi, begins work on the abandoned dome of Florence. The procedure to build it was extremely difficult, as there was no wooden supports for the structure. During the time Brunelleschi was planning it, he became extremely paranoid that someone would steal his plans. Again, the date is unknown.
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Father of Cosimo is honoured as the head of state in florence. This high position was later passed onto his son Cosimo following his death. -Unknown Date
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Giovanni di Bicci, father and beloved mentor of Cosimo passes away. Cosimo is now the owner of the Medici bank. -unknown date
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Enemies and a threat to the rulers of Florence, the dreaded Albizzi family declares war on the Medicis.
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A public vote deems Cosimo De' Medici without a high status. Cosimo is banished from Florence in accordance to a public vote. Cosimo is banished from Florence for ten years. -Unknown date
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The leaders of Florence fall. This means that there was currently no ruler over Florence.
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With the Albizzi no longer ruling, Pope Engenius IV demands that Cosimo return from his years of wandering to reclaim his leadership over Florence.
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Brunellschi's project turned out to be a major success. The risky and life-threatning procedure of renovating without wooden balustrades. Thanfully, the procedure that could've ended in ruins ended up a success.
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Lorenzo De'Medici was born the first grandson to Cosimo De'Medici. Heir to the prestigious fortune after his father, Lorenzo was the key to maintaining the Medici's rule over Florence.