The feast of the Holy Trinity, which is celebrated on the Sunday after Pentecost, was established for the whole Western Church in 1134 by pope John XII. The Angelic Trisagion is said for the three ...

The Feast commemorates the Baptism of Christ and the divine revelation of the Holy Trinity. At the Baptism of Christ, all three Persons of the Holy Trinity—Father, Son, and Holy Spirit—were made ...

The Feast is also seen as the culmination of the revelation of the Holy Trinity. The story of Pentecost is found in the book of The Acts of the Apostles. In Chapter two we are told that the Apostles ...

the Holy Trinity (God the Son, God the Father and God the Holy Spirit) appeared to the world for the first time. The Holy Spirit descended like a dove and rested on Jesus Christ. A voice from ...