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In page Lucrezia Tornabuoni:

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Lucrezia was born in Florence, Italy on 22 June 1427. Her father was Francesco di Simone Tornabuoni, member of a noble family that could trace its lineage back 500 years. It is uncertain if her mother was her father's second wife, Marianna Guicciardini, known as Nanna, or the third, Francesca Pitti.[1] Her brother Giovanni became a banker and diplomat.[citation needed]