Princess Gloria von Thurn und Taxis hurried through the medieval monastery that is part of her 500-room palace. It was a chilly autumn night in Bavaria, with rain spitting outside, as she arrived at the chapel to pray. The room glowed red, lit from a crypt below where her husband and other family members lay in their coffins. The princess knelt and soft bells sounded. Her dinner guests, a British baroness and her husband, slipped in to join her as a priest led prayers. Princess Gloria, 64, who burst onto the international scene in the 1980s..as since evolved into a...