The papacy has long denied the existence of a female pope, yet there is ample evidence that she was, indeed, real. Forbidden is the intriguing story of Pope John (855-858) the only woman to have served as Pope of the Roman Catholic Church. Born a poor girl in Mainz, Germany, Agnes Johanna was a truly gifted learner who was allowed to study in the local monastery. When she reached the age of 12, she was promised to an oaf...