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

YEREVAN—Hundreds of Armenians gathered at Zvartnots International Airport on June 10 to welcome Catholicos of All Armenians ...

The first ecumenical council, known as the Council of Nicaea, is still accepted as authoritative by the Catholic Church, the ...

Pope Leo XIV meets with participants in the Symposium “Nicaea and the Church of the Third Millennium: Towards ...

Pope Leo XIV greets Orthodox Metropolitan Emmanuel of Chalcedon, a bishop of the Orthodox Ecumenical Patriarchate, during a ...

By celebrating together this Nicene faith and by proclaiming it together, we will also advance towards the restoration of ...

Christian unity will not be “primarily the fruit of our own efforts, nor will it be realized through any preconceived model ...

"Through theological dialogue and with the help of God, we will gain a better understanding of the mystery that unites us." ...

The bishop invokes the outpouring of the Spirit in these words: All-powerful God, Father of our Lord Jesus ... Church, to her apostolic origins, and to her mission of bearing witness to Christ.

Many people have looked at Pope Leo XIV's discrete decisions as tea leaves about his pontificate. It is smarter to highlight ...

Recognizing the essential tenets of faith that Catholics and Orthodox share should be the lens through which they discuss the issues that continue to separate them, Pope Leo XIV said.

Pentecost is not only the birthday of the Church, but also a celebration of the courage given by the Holy Spirit, says ...