It is considered one of the most personal of Gian’s work, and the bust expresses Piccolomini Bonarelli who was the wife of the famous Matteo, one of Bernini’s co-workers and students. Bust of Costanza Bonarelli is an exceptional sculpture since it breaks the main tradition of the 17th-century portrait reviews and sculpturing the styles of the next century.Due to his religious fervour and the fact that the majority of his commission was provided by the religious figures, most of his work was religious by theme and nature. However, due to the influence of several classical collections of the Scipione Borghese, one of his patrons Bernini had an interest in the mythological techniques and figures. Also, due to the patronage which he was driven by, he created a series of portraits that were both in sculpted busts and painted forms.”