Pope Leo’s first encyclical addresses Artificial Intelligence (AI) and ‘magnificent humanity’
Pope Leo XIV (born Robert Francis Prevost on September 14, 1955, in Chicago, Illinois) is the 267th Pope of the Roman Catholic Church and the first pope born in the United States. Elected on May 8, 2025, he succeeded Pope Francis and became the first member of the Order of Saint Augustine to ascend to […]
The Magisterium of the Popes and nuclear weapons
Our Editorial Director recalls the teachings of the Popes on nuclear weapons since the atomic bombings of Japan in August 1945. By Andrea Tornielli Since the tragedy caused by the atomic bombings of Japan in August 1945, the Church has reflected on the risk of humanity destroying itself. In his Christmas Radio Message of 1955, Pius […]
Apostolic Letter “A fidelity that generates the future” of the Holy Father Leo XIV on the 60th anniversary of the Conciliar Decrees Optatam Totius and Presbyterorum Ordinis, 22.12.2025
1. A fidelity that generates the future is what priests are called to today. Appreciating the value of perseverance in the apostolic mission gives us the opportunity to reflect on the future of our ministry and to help others experience the joy of the priestly vocation. The sixtieth anniversary of the Second Vatican Council, which […]
DOCTRINAL NOTE ON THE MORAL LIMITS TO TECHNOLOGICAL MANIPULATION OF THE HUMAN BODY
Committee on Doctrine United States Conference of Catholic Bishops 1. Modern technology offers an ever-increasing range of means—chemical, surgical, genetic— for intervening in the functioning of the human body, as well as for modifying its appearance. These technological developments have provided the ability to cure many human maladies and promise to cure many more. This […]
MORTALIUM ANIMOS
ENCYCLICAL OF POPE PIUS XI ON RELIGIOUS UNITYTO OUR VENERABLE BRETHREN THE PATRIARCHS, PRIMATES, ARCHBISHOPS, BISHOPS, AND OTHER LOCAL ORDINARIES IN PEACE AND COMMUNION WITH THE APOSTOLIC SEE. Venerable Brethren, Health, and Apostolic Benediction. Never perhaps in the past have we seen, as we see in these our own times, the minds of men so […]
Apostolic Letter “In unitate fidei” of Pope Leo XIV on the occasion of the 1700th anniversary of the Council of Nicaea, 23.11.2025
1. In the unity of faith, proclaimed since the beginning of the Church, Christians have been called to walk in harmony, guarding and transmitting the gift they have received with love and joy. This is expressed in the words of the Creed, “I believe in one Lord Jesus Christ, the Only Begotten Son of God… […]
Vatican Letter to Priests on Obedience
“It Is Truly Possible to Give All to Christ” From the Vatican, Nov. 18, 2009 Here is the letter the Secretary of the Congregation for Clergy, sent to priests on the promise of obedience. “Do you promise filial respect and obedience to me and my successors?” (Pontificale Romanum. De Ordinatione Episcopi, presbyterorum et diaconorum, Edition […]
Sacra Virginitas – Encyclical of Pope Pius XII on Consecrated Virginity
March 25th, 1954 58. The educators of the young clergy would render a more valuable and useful service, if they would inculcate in youthful minds the precepts of Christian modesty, which is so important for the preservation of perfect chastity and which is truly called the prudence of chastity. For modesty foresees threatening danger, forbids […]
Creeds of the Catholic Church
The Creed of Pius IV Also called The Tridentine Creed of 1564 The Professio fidei Tridentinae, also known as the Creed of Pope Pius IV, is one of the four authoritative Creeds of the Catholic Church. As the name implies, it was composed by Pope Pius IV under the auspices of the Council of Trent. […]
CONCILIO CONSTANTINOPOLITANO I APOSTOLIC LETTER OF HIS HOLINESS JOHN PAUL II TO THE BISHOPS OF THE CATHOLIC CHURCH FOR THE 1600TH ANNIVERSARY OF THE FIRST COUNCIL OFCONSTANTINOPLE AND THE 1550TH ANNIVERSARY OF THE COUNCIL OF EPHESUS
My dear brothers in the Episcopate, I. 1. I am impelled to write you this letter-which is both a theological reflection and a pastoral invitation coming from the depths of my heart-first of all, by the Sixteenth Centenary of the First Council of Constantinople, which was held in the year 381. As I pointed out […]