Pope Celestine I
Pope Pius IX convened the First Vatican Council which began in 1868. Pope John XXIII convened the Second Vatican Council which began in 1962. Pope Paul VI reconvened the Second Vatican Council in 1963 after it was suspended due to the death of Pope John. Pope John had to close the First Vatican Council before opening the Second Council since the First Council was never officially closed by Pius, it ended abruptly, or temporarily suspended because the Franco-Prussian War broke out and the bishops in attendance wanted to return to their diocese. After Rome was captured, Pope Pius permanently suspended the Council but did not close it officially. Pope John died during the intermission break between the first and second session of the Second Council to which it was suspended. Once Cardinal Giovanni Montini was elected as Pope Paul VI, he reconvened the Second Council and presided over it until its ending in 1965.
Pope Pius V called for the First Vatican Council.
Pope John XXIII convened the Council and Pope Paul VI made the changes to the Mass.
The First Vatican Council was convoked by Pope Pius IX on June 29, 1868, and opened on December 8, 1869, by Pope Pius IX.
Bl. Pope Gregory X reigned from 1271 to 1276.
Pope Urban II asked Christians to join the Crusades and reclaim the Holy Land from Muslim control during his speech at the Council of Clermont.
Because the papacy grew in importance after his election
Pope Urban II called for the Crusade at the Council of Clermont, in the year 1095.
Pope Urban II asked Christians to join the Crusades and reclaim the Holy Land from Muslim control during his famous speech at the Council of Clermont.
Pope John XXIII called for the council and Pope Paul VI continued it after he was elected pope in 1963.
Pope Paul III called for the council.
They are two Popes: John the 23 during 1960-63 and Pope Paul 6 to 1965.