when did the doctrine of papal infallibility begin
Papal infallibility This doctrine was defined dogmatically at the First Ecumenical Council of the Vatican of 1869â€“1870, but had been defended before that, existing already in medieval theology and being the majority opinion at the time of the Counter-Reformation.[3]
Council of Trent These decrees were later supplemented by the First Vatican Council of 1870.
Alonso Álvarez de Pineda
Paris Peace Accords