section_path: Theology/Mariology
section_name: Mariology
paragraph_text: Mariology
  
  His predecessor, Pope Pius IX, became known as the Pope of the Immaculate Conception because of his dogmatization in 1854. Leo XIII, in light of his unprecedented promulgation of the rosary in 11 encyclicals, was called the Rosary Pope because he promulgated Marian devotion. In his encyclical on the 50th anniversary of the Dogma of the Immaculate Conception, he stresses Mary's role in the redemption of humanity and calls her Mediatrix and Co-Redemptrix. While allowing the title "Mediatrix", recent popes, following on the Second Vatican Council, have warned away from the term "co-redemptrix" as derogating from the one mediator, Jesus Christ.
  
  His predecessor, Pope Pius IX, became known as the Pope of the Immaculate Conception because of his dogmatization in 1854. Leo XIII, in light of his unprecedented promulgation of the rosary in 11 encyclicals, was called the Rosary Pope because he promulgated Marian devotion. In his encyclical on the 50th anniversary of the Dogma of the Immaculate Conception, he stresses Mary's role in the redemption of humanity and calls her Mediatrix and Co-Redemptrix. While allowing the title "Mediatrix", recent popes, following on the Second Vatican Council, have warned away from the term "co-redemptrix" as derogating from the one mediator, Jesus Christ.