Overview
- Issued on Nov. 23, the Apostolic Letter In Unitate Fidei urges the Church to rekindle enthusiasm for the profession of faith on the anniversary of the Council of Nicaea.
- Pope Leo XIV presents the Nicene Creed as the shared reference for dialogue, arguing that unity enriches traditions and must be pursued through patient listening and reconciliation.
- The letter explicitly recalls Saint John Paul II’s 1995 encyclical Ut Unum Sint to place today’s ecumenical efforts in continuity with modern conciliar priorities.
- The Vatican says the pope will visit Ankara, Istanbul and İznik (ancient Nicaea) in Türkiye, with Lebanon also on the itinerary, to commemorate the council and engage partners in ecumenical outreach.
- Analysis notes enduring hurdles such as the filioque clause and other Christological sensitivities, even as the pope highlights common baptism and a shared creed as foundations for closer unity.