An Ecumenical Council (Considered the 8th Ecumenical Council by the Catholic Church) was convoked as the Fourth Council of Constantinople to decide this matter.
Pope John Paul II | Pope Benedict XVI | Pope | Pope Paul VI | Alexander Pope | Pope Pius IX | Pope Pius XII | Pope Francis | Pope Leo XIII | Pope Pius XI | Pope John XXIII | Pope Innocent IV | Pope Pius VII | Adrian Ross | Pope Pius X | Pope John Paul I | Adrian Rogers | Pope Alexander III | Pope Clement VII | Pope Urban VIII | Pope Clement V | Pope Pius VI | Pope Julius II | Pope Gregory VII | Pope Clement VIII | pope | Pope Sixtus V | Pope Alexander VI | Pope Benedict XIV | Pope Benedict XV |