Second Vatican Council, 21st ecumenical council of the Roman Catholic Church (1962–65), announced by Pope John XXIII on Jan. 25, 1959, as a means of spiritual renewal for the church and as an occasion for Christians separated from Rome to join in search for reunion. Preparatory commissions appointed by the Pope prepared an agenda and produced drafts (schemata) of decrees on various topics. In opening the council on Oct. 11, 1962, the Pope advised the council fathers to try to meet the pastoral needs of the church. Those summoned to the council included all Catholic bishops and certain other church dignitaries. Invited to the council sessions, but without the right to vote, were a number of observers from the major Christian churches and communities separated from Rome and a number of Catholics called auditors.