It's no secret that the marriages of monarchs are often made in hell. Here are some of the most spectacular mismatches in five hundred years of royal history.... In a world where many kings, queens, and princes lacked nothing but true love, marital mismatches could bring out the baddest, boldest behavior in the bluest of bloodlines. Margaret Tudor, her niece Mary I, and Catherine of Braganza were desperately in love with chronically unfaithful husbands,...