Around 33 AD - After His death and resurrection, when it was time for Jesus to ascend to Heaven, He told His followers to wait for The Promise of the Father. With the coming of the Holy Spirit the lives of individuals were changed, the community itself was transformed, the Church was born!
9th Century AD - Veni Creator Spiritus was composed by Rabanus Maurus (780 AD - 856 AD). It has since been used as an invocation of the Holy Spirit, sung on the feast of Pentecost, the entrance of Cardinals to the Sistine Chapel when they elect a new pope, as well as at the consecration of bishops and the ordination of priests; also, when celebrating the sacrament of Confirmation.
January 1, 1901 - Pope Leo XIII sang the Veni Creator Spiritus by the Holy Spirit window in St. Peter's Basilica in Rome, asking for a fresh outpouring of the Holy Spirit upon the Whole church. That same day, in Topeka, Kansas, at the Bethel College and Bible School, the Holy Spirit came upon a group of Protestants who had been praying to receive the Holy Spirit as the early Church did in Acts.
October 11, 1962 - At the opening of the Second Vatican Council, “Veni, Creator Spiritus” were the very first words with which the Second Vatican Council opened. Pope John XXIII intoned the words of that hymn as he knelt before the central altar at St. Peter’s in Rome. In preparation, he prayed for God to, "Renew Your wonders in this our day, as by a new Pentecost.