Focus on this artwork and analyze the Bia de' Medici.
Bia de' Medici, (c. 1536 – 1 March 1542) was the illegitimate daughter of Cosimo I de' Medici, Grand Duke of Tuscany, born before his first marriage.
The identity of Bia's mother is not known, but Cosimo I was likely no older than sixteen when he fathered her. According to Edgcumbe Staley's The Tragedies of the Medici, some stories  said the girl's mother was a village girl from Trebbio, where the Medicis had built one of their first villas, while others said she was a gentlewoman from Florence. Only Cosimo I and the girl's paternal grandmother, Maria Salviati, knew the identity of the girl's mother, but Salviati refused to reveal it, though she did acknowledge Bia was the daughter of Cosimo.
Staley wrote that the little girl was called La Bia, short for Bambina (little girl or baby). The name might also have been short for Bianca or perhaps a classical name, deriving from Pallas' daughter. Staley wrote that her father's new wife, Eleonora di Toledo, refused to tolerate her presence in the palace after their marriage, so Cosimo sent her off to the Villa di Castello, her paternal grandmother's chief residence north of Florence. However, other more reliable reports indicate that her stepmother "brought her up very lovingly." Her paternal grandmother supervised the nurseries for all of the children of Cosimo I. All of them, not only Cosimo's illegitimate daughter, spent most of their time at the Villa di Castello and were raised by nurses, with minimal day-to-day contact with their parents, though both Cosimo and Eleonora heard reports of their progress and offered directions for their education, their living arrangements, and the clothing they wore. Bia shared her nursery with Giulia de' Medici, the illegitimate daughter of Alessandro de' Medici, Duke of Florence, who was close to her in age. She grew into a high-spirited, loving little girl who kept her grandmother and nurses entertained with her antics. Bia's father adored his first-born child, and her paternal grandmother, Maria Salviati, said the little girl "was the comfort of our court, being so very affectionate."Both Bia and her cousin Giulia contracted a fast-moving fever in February 1542, from which Giulia recovered but Bia did not. Cosimo I received almost daily reports of Bia's worsening condition from his mother, Maria Salviati. The child grew weaker between 25 February and 28 February and finally died on 1 March 1542. She was buried in the Medici family crypt in San Lorenzo.When her legitimate half-sister Isabella de' Medici was born six months after her death, her father rejoiced to have another daughter. Contemporaries who might normally have consoled him on his wife's failure to present him with a second son instead congratulated him on her birth, knowing how he had grieved for the loss of Bia. "(I) congratulate you on the beautiful baby girl God has conceded to you in recompense for the one he has taken to join him in paradise," wrote Paolo Giovio after the birth of Isabella. A comparison of portraits of Bia and Isabella reveal that, had she lived past early childhood, Bia likely would have closely resembled her half-sister Isabella, who shared her reddish-blonde hair, brown eyes, and dainty features.
first villas Pallas Cosimo I de' Medici, Grand Duke of Tuscany Maria Alessandro de' Medici, Duke of Florence Florence Cosimo I de' Medici Isabella de' Medici Bianca San Lorenzo Maria Salviati Giulia de' Medici Villa di Castello illegitimate Paolo Giovio gentlewoman Bia de' Medici Isabella Medici Eleonora di Toledo