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On September 27th, 1389, Cosimo de' Medici was born.
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In sometime in 1434, Cosimo de' Medici returned from the outskirts of the city.
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Sometime in 1434, Cosimo de' Medici began the many years of the Medici family being in power of all of Florence.
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By the mid-1400's, Cosimo de Medici had built a thriving banking business. From this business, lots of people started calling Florence "The Banking City of Florence."
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Cosimo de' Medici's life ended sadly on August 1st, 1464, in Villa Medici at Careggi.