Princess X - 1915-1916 - by Constantin Brancusi (French, born Romania, 1876-1957) - Polished bronze; limestone block - © Collection Centre Pompidou, Paris - Refers to Princess Marie Bonaparte, a direct descendant of Napoleon Bonaparte. She was a psychoanalyst and a close friend of Sigmund Freud. Her most famous research was based on women’s ability to have an orgasm, hence the sexual form of Brancusi’s sculpture.