Costanzo I Sforza
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Costanzo I of Sforza (July 1447 - July 4, 1483) was an Italian condottiero, lord of Pesaro e Gradara.
He was the son of Alessandro Sforza, under which he fought in his early years and by which he inherited the lordship of Pesaro. He also received the lordship of Gradara by Pope Alexander VI.
He fought for various Italian states of the time, including the Kingdom of Naples and the Papal States.
His son Giovanni succeeded him in Pesaro.