Mary Tudor, as we all know, brought England back into the Catholic fold after the reigns of Henry VIII and Edward VI, but her efforts were undone when she died childless and her sister Elizabeth converted the country to Protestantism.
Let's suppose that Mary has doubts about her sister's commitment to Catholicism, and decides to marry Elizabeth to a Catholic nobleman so that, if Mary dies without an heir, Elizabeth's husband will be able to keep her and the country on the religious straight and narrow. Would such a plan be feasible? And whom would Mary be most likely to choose as Elizabeth's husband?