First Vatican Council

The First Ecumenical Council of the Vatican, commonly known as the First Vatican Council or Vatican I, was the 20th ecumenical council of the Catholic Church, held three centuries after the preceding Council of Trent which was adjourned in 1563. The council was convoked by Pope Pius IX on 29 June 1868, under the rising threat of the Kingdom of Italy encroaching on the Papal States. It opened on 8 December 1869 and was adjourned on 20 September 1870 after the Italian Capture of Rome. Its best-known decision is its definition of papal infallibility.

The council's main purpose was to clarify Catholic doctrine in response to the rising influence of the modern philosophical trends of the 19th century. In the Dogmatic Constitution on the Catholic Faith (Dei Filius), the council condemned what it considered the errors of rationalism, anarchism, communism, socialism, liberalism, materialism, modernism, naturalism, pantheism, and secularism.

Its other concern was the doctrine of the primacy (supremacy) and infallibility of the Bishop of Rome (the Pope), which it defined in the First Dogmatic Constitution on the Church of Christ (Pastor aeternus).

As early as late 1864, Pope Pius IX had commissioned the cardinals resident in Rome to tender him their opinions as to the advisability of a council. The majority pronounced in favour of the scheme, dissenting voices being rare. After March 1865, the convocation of the council was no longer in doubt. Special bulls were reportedly issued with invitations to Eastern Orthodox and Protestant clerics as well as to other non-Catholics, but apparently none accepted the invitations.

The council was summoned by the pope by a bull on 29 June 1868. The first session was held in St. Peter's Basilica on 8 December 1869. Preliminary sessions dealt with general administrative matters and committee assignments. Bishop Bernard John McQuaid complained of rainy weather, inadequate heating facilities, and boredom. Bishop James Roosevelt Bayley of Newark, New Jersey, noted the high prices in Rome. When Lord Houghton asked Cardinal Manning what had been going on, he answered: "Well, we meet, and we look at one another, and then we talk a little, but when we want to know what we have been doing, we read The Times."

Unlike the five earlier general councils held in Rome, which met in the Lateran Basilica and are known as Lateran councils, it met in Saint Peter's Basilica in the Vatican, hence its name.

The object of the council was a mystery for a while. The first revelation was given in February 1869 by an article in La Civiltà Cattolica, a Jesuit periodical. It claimed, as the view of many Catholics in France, that the council would be of very brief duration, since the majority of its members were in agreement, and mentioned inter alia the proclamation of papal infallibility. Factions around the proposal arose across Europe, and some Italians even proposed setting up a rival council in Naples. However, before the council met all became quiet in view of the studied vagueness of the invitation.

Pope Pius defined as dogma the Immaculate Conception of Mary, the mother of Jesus, in 1854. However, the proposal to define papal infallibility itself as dogma met with resistance, not because of doubts about the substance of the proposed definition, but because some considered it inopportune to take that step at that time. Richard McBrien divides the bishops attending Vatican I into three groups. The first group, which McBrien calls the "active infallibilists", was led by Henry Edward Manning and Ignatius von Senestrey. According to McBrien, the majority of the bishops were not so much interested in a formal definition of papal infallibility as they were in strengthening papal authority and, because of this, were willing to accept the agenda of the infallibilists. A minority, some 10% of the bishops, McBrien says, opposed the proposed definition of papal infallibility on both ecclesiastical and pragmatic grounds, because, in their opinion, it departed from the ecclesiastical structure of the early Christian church. From a pragmatic perspective, they feared that defining papal infallibility would alienate some Catholics, create new difficulties for union with non-Catholics, and provoke interference by governments in ecclesiastical affairs. Those who held this view included most of the German and Austro-Hungarian bishops, nearly half of the Americans, one third of the French, most of the Chaldaeans and Melkites, and a few Armenians. Only a few bishops appear to have had doubts about the dogma itself.