The existing canons of the Council of Nicaea show that no Biblical canon was determined. While at least one Church Father, St. Jerome, noted that one book was determined to be Scripture at the council ...

Pope Leo XIV greets participants attending a conference on the ecumenical implications of the 1,700th anniversary of the Council of Nicaea June 7, 2025, in the Clementine Hall of the Apostolic Palace ...

The Catholic Church this year marks the 1,700th anniversary of the First Council of Nicaea, the first ecumenical synod in the history of the Church, convened by Emperor Constantine in what is now the ...

From the beginning of his election as the successor to St. Peter, Pope Leo XIV has summoned the Church to a renewed faith in the one Savior. As he said emphatically in the opening Mass of his ...

Icon from the Mégalo Metéoron Monastery in Greece, representing the First Ecumenical Council of Nikea 325 A.D., with the condemned Arius in the bottom of the icon. (Credit: Wikimedia.) Listen As the ...

(RNS) — In the United States, Catholics kneel during the Eucharistic prayer while Catholics in the rest of the world stand. Many European churches, especially the older ones, do not even have kneelers ...

In the past week, scientists announced the discovery of ancient Roman ruins underneath the surface of the lake in Iznik, Turkey. But this was not just any archaeological discovery. They have may have ...

Pope Leo XIV speaks in St. Peter’s Square in the Vatican on Nov. 23, 2025. (Credit: Vatican Media.) Listen On Sunday, just ahead of his trip to Türkiye and Lebanon, Pope Leo XIV wrote about the 1700th ...

When the Roman Emperor Constantine convened the Council of Nicaea in 325 A.D., both the church and the empire were in a state of flux. A little more than a decade earlier, Constantine had legalized ...

Every so often, someone makes an attempt to sort out Easter. In 1928 the British parliament even got around to passing an Easter Act, which declared that the holiday should come on the first Sunday ...