There has been a church on the site of San Lorenzo since 393, making it one of the oldest churches in Florence. The church as it appears now, however, is the result of a renovation begun in 1421 by Giovanni di Bicci de'Medici, who commissioned a new design for the church from Filippo Brunelleschi. This began a relationship between the Medici family and San Lorenzo that lasted for more than a century. The family lavished money on the church with a variety of projects, including the Medici Chapel.
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