Many sacred beliefs of our Catholic faith can be traced to the 21 ecumenical councils held since the fourth century.

This year, the universal Church celebrates the 1,700th anniversary of the Council of Nicaea, the first ecumenical council ...

The Armenians also fell into heresy after the Council of Chalcedon. The Council of Florence in 1439 declared reunion with the Armenians, and Pope Benedict XIV confirmed the first Patriarch in 1742.

But Pope St. Leo I, following an ancient Latin ... even before Rome, in 451 at the Council of Chalcedon, came to recognize and receive the Symbol of 381. The use of this formula in the Creed ...

This decision was further explained by the Council of Chalcedon (451 ... but it was proclaimed as an independent dogma by Pope Pius IX in his Apostolic Constitution "Ineffabilis Deus" (December ...

When someone accepts election as pontiff, there undergoes a change in that individual, not only in life purpose in leading ...

Bishops who supported Nicaea, such as Hilary of Poitiers, Athanasius of Alexandria, and even Pope ... Council of Constantinople was later recognized as an ecumenical council. The Council of ...

In Istanbul, where he has lived since his election as Metropolitan of Chalcedon ... of the Council of Nicaea, hoping to establish “a common date for Easter” and to welcome Pope Francis to ...

particularly at the council of Chalcedon in 451 AD. Then there was Gregory the Great, it was during his term that the word ‘pope’ was almost exclusively applied to the Roman bishop and he believed the ...