Costanza Piccolomini Bonarelli
Costanza Bonarelli (c. 1614 – 3 December 1662), also known as Costanza Bonucelli or Costanza Piccolomini Bonucelli, was an Italian noblewoman, merchant and art dealer, descended from a Sienese noble family. She was the mistress of the sculptor and architect Gian Lorenzo Bernini, who in the 1630s created a bust of her, now exhibited at the Bargello in Florence.