Osternacht
The service is a 1967 restoration of the rite recorded in the early 200s by the historian Hippolytus who writes of a ceremony taking place during the Easter Vigil at which two holy oils were blessed and one was consecrated. In the fifth century, the ceremony of the oils was transferred from the Easter Vigil to Holy Thursday. A separate mass for that purpose was instituted and made distinct from the Mass of the Lord's Supper. The change took place not only due to the large crowds that assembled for the Easter Vigil on Holy Saturday night, but to fully emphasize Christ's institution of the ordained priesthood during what is traditionally called The Last Supper. In the decree renewing this rite Pope Paul VI said:“The Chrism Mass is one of the principal expressions of the fullness of the bishop’s priesthood and signifies the closeness of the priests with him.”