Vatican City, Nov 23, 2025 / 12:29 pm

Pope Leo XIV has called on Christians to move beyond “theological controversies” that no longer serve the cause of unity and to rediscover together the faith professed at the Council of Nicaea 1,700 years ago.

In a new apostolic letter, In unitate fidei (“In the Unity of Faith”), released Nov. 23, the solemnity of Christ the King, the pope links the anniversary of the first ecumenical council to the Holy Year of 2025 and to his upcoming apostolic journey to Türkiye, where he will commemorate Nicaea’s 1700th anniversary and take part in an ecumenical event with Ecumenical Patriarch Bartholomew on Nov. 30 before traveling on to Lebanon.

“I would like this Letter to encourage the whole Church to renew her enthusiasm for the profession of faith,” th

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