From Phryné before the Areopagus:
Phryne (Φρύνη) was a famous hetaera (courtesan) of Ancient Greece (4th century BC) who adjusted her prices for customers depending upon how she felt about them emotionally. As accounts portray her, she always had her price, and if the customer met it, she would uphold her end of the bargain.
When accused of profaning the Eleusinian mysteries, she was defended by the orator Hypereides, one of her lovers. When it seemed as if the verdict would be unfavourable, he tore open her robe and displayed her breasts, which so moved her judges that they acquitted her. According to others, she herself removed her clothing. The judges' change of heart was not simply because they were overcome by the beauty of her nude body, but because physical beauty was often seen as a facet of divinity or a mark of divine favor during those times.
The scene was depicted Phryne before the Areopagus, a 1861 painting by Jean-Léon Gérôme:
http://upload.wikimedia.org/wikipedia/commons/d/d0/Fryne_przed_areopagiem.jpg