From one of the richest and noblest Venetian families, she was famed for her great beauty. At the age of fifteen she fell in love with Pietro Bonaventuri, a young Florentine clerk in the firm of Salviati, and on November 28, 1563 escaped with him to Florence, where they were married and in 1564 she had a daughter named Virginia. The Venetian government made every effort to have Bianca arrested and brought back; but the Grand Duke Cosimo di Medici intervened in her favour. She used her beauty to marry Francesco di Medici. She and Francesco died the same day. A forensic test in 2007 showed evidence of arsenic poisoning.
Her Wikipedia article is here.

Bianca Capello by Lavinia Fontana (Musee des Beaux Artes Valenciennes - Valenciennes, Nord-Pas de Calais France)

1579-1583 (between) Bianca Cappello by Girolamo Macchietti (Museo Nazionale di Palazzo Mansi - Lucca, Tuscany Italy)

ca. 1580 Bianca Cappello, Second Wife of Francesco I de' Medici by Alessandro Allori (Galleria degli Uffizi - Firenze Italy)

1580-1614 Grand Duchess Bianca Capello de Medici with Her Son by Lavinia Fontana (Dallas Museum of Art - Dallas Texas)

1584-1585 (probable) Bianca Cappello, Grand Duchess of Tuscany by Scipione Pulzone (Kunsthistorisches-museum - Wien Austria)
