I think this is the most breathtaking drawing I've ever seen (printed). First thing I'll do if I evermanage to go to New York is go and meet the lady in person at the Metropolitan Museum.
It's the study for the Libyan Sibyl that Michaelangelo painted in the Sixtina Chapel in the Vatican.
It's funny how the final rendering of the painting does not produce the same effect on me as this drawing. Her expression shows to me in a way that I cannot explain the whole point of art in this planet. You can see the finished painting here.