I remember watching a movie as a kid about a thief in some Arab country that has help from a young woman when he's trying to steal a treasure. Most memorable to me is when she snakelike makes her way into the room through a window that is locked by 3 rows of bars. She squeezes through in between them and he is all astonished. For a while I thought it was a Burt Lancaster movie, but I don't think so anymore. Anybody remember?