Ninon de Lenclos's blatant disregard for religion prompted Anne of Austria (mother of Louis XIV) to have her confined to a monastery. While she did not discover a new faith, she did manage to reaffirm an old one: Sex. Ninon allegedly seduced (or was seduced by) 439 monks before friends could arrange for her release.
[Ninon also seduced many prominent literary and political figures, among them the playwright Moliere and the philosopher Saint Evremond. Cardinal Richelieu once offered 50,000 crowns for a single night with Ninon. She gladly accepted, and sent a friend in her place.]