Bianca Maria Sforza - Family and Lineage

Family and Lineage

Bianca was born in Pavia on 5 April 1472, the eldest daughter of Galeazzo Maria Sforza, Duke of Milan, by his second wife, Bona of Savoy, whom he had married in 1468, a year after the death of his first wife, Dorotea Gonzaga, who did not bear him children. Bianca's paternal grandparents were Francesco I Sforza and Bianca Maria Visconti, for whom she was named. Her maternal grandparents were Louis, Duke of Savoy and Anne de Lusignan of Cyprus. She had an older brother Gian Galeazzo Sforza, who married their first cousin, Isabella of Naples, by whom he had issue, and a younger sister Anna Sforza, first wife of Alfonso I d'Este, Duke of Ferrara, who, after Anna's death in childbirth, would marry secondly, Lucrezia Borgia. Bianca's older illegitimate half-sister was Caterina Sforza from her father's relationship with Lucrezia Landriani. Her uncle was Ludovico Sforza Il Moro, Duke of Milan, who married Beatrice d'Este, and her aunt was Ippolita Maria Sforza, first wife of King Alfonso II of Naples.

When Bianca was not yet five years old, her father was assassinated inside the Church of Santo Stefano in Milan on 26 December 1476, which was the Feast Day of St. Stephen. He was stabbed to death by three high-ranking officials of the Milanese court.