"E Supremi" is an encyclical written by Pope Pius X in 1903, and its full title in English is "On the Restoration of All Things in Christ." This encyclical reflects Pope Pius X's vision for the renewal and revitalization of the Catholic Church in the early 20th century.

In "E Supremi," Pope Pius X emphasizes the importance of restoring all things in Christ. He calls for a spiritual renewal and a return to the principles and teachings of the Catholic faith. The encyclical encourages the faithful to seek holiness and to live in accordance with the Gospel. Pope Pius X also addresses issues such as the role of the clergy, religious education, and the promotion of Christian values in society.

This encyclical is notable for its emphasis on the spiritual life and the need for a deeper and more profound connection with Christ. It sets the tone for Pope Pius X's papacy, during which he promoted a more traditional and devout form of Catholicism. "E Supremi" serves as an important document in the early 20th-century Catholic Church and reflects the papal vision of restoring and rejuvenating the faith.