20th-century history of the Catholic Church in the United States 20th-century history of the Catholic Church in the United States The 20th-century history of the Catholic Church in the United States was characterized by a period of continuous growth for the Church in the United States, with Catholics progressively evolving from a small minority to a large minority. In 1900 the Catholic population was 10 million, under the control of 14 Archbishops, 77 bishops, and 12,000 priests . The community had built 10,000 churches, of which two-thirds had resident pastors. Catholic schools educated nearly 1,000,000 children and youth. Catholics were heavily concentrated in the industrial and mining centers of the
Christianity in the 20th century Second Vatican Council, known as Vatican II, was the issuance by Pope Paul VI and Patriarch Athenagoras of a joint expression of regret for many of the past actions that had led up to the Great Schism between the Western and Eastern churches, expressed as the Catholic-Orthodox Joint declaration of 1965. At the same time, they lifted the mutual excommunications dating from the 11th century. Intended as a continuation of Vatican I, under Pope John XXIII the council developed into an engine of modernisation. It was tasked with making the historical teachings of the Church clear to a modern world