From The Art and Popular Culture Encyclopedia
Constantin Brâncuşi's Princess X (1916)  is a representation of a phallus, although the artist - similar to a ploy used by Magritte in The Treachery Of Images when he said: "Ceci n'est pas une pipe" - himself always contended that it depicted the "eternal feminine" or an "anonymous portrait". Brancusi's contribution to the Paris Salon des Indépendants of 1920, it provoked a quite a furor and had to be withdrawn following the intervention of the police.
Some sources state that "Princess X" was revealed to be Princess Marie Bonaparte, direct descendant of Napoleon Bonaparte. Brâncuşi represented or caricatured her life as a large gleaming bronze phallus. This phallus symbolizes the model's obsession with the penis and her lifelong quest to achieve vaginal orgasm, with the help of Sigmund Freud.