I recently read that John Paul II had the Sistine Chapel ceiling restored because he wanted the originally nude figures that had been covered over by the direction of prudish popes of the past, uncovered. Are there more details to this story? What is the date and source of your information?

Also, Michelangelo is supposed to have included in the Sistine Chapel, an unflattering portrait of a certain cardinal, with a snake biting the cardinal's genitals, because the cardinal had opposed the nude figures Michelangelo painted. Is this true? What is the date and source of your information?

Thank you.