Costanzo II Sforza

Giovanni Maria Sforza (Gradara, 24 February 1510 – 1512) was, using the name Costanzo II, Lord of Pesaro from 1510 to 1512.

He was the son of Giovanni Sforza, Lord of Pesaro, and of his third wife Ginevra Tiepolo. Giovanni Sforza had been the first husband of Lucrezia Borgia but their marriage was declared invalid by Pope Alexander VI because of the supposed impotence of the groom.

After seven years, Giovanni married Ginevra, a marriage that produced only one child. Giovanni Maria became fatherless few months after his birth, when his father died on 27 July. Following Giovanni Sforza's death, Giovanni Maria became the fourth Lord of Pesaro, changing his name for Costanzo II. Being a minor, his paternal uncle Galeazzo Sforza was appointed regent.

Costanzo died in 1512, legally making the heir to his estate his paternal uncle. However, Pope Julius II decided to hold the government of Lordship and did not allow to succeed. In this way Costanzo was the last Sforza Lord.