Missale Romanum is the incipit of the apostolic constitution of 3 April 1969 by which Pope Paul VI promulgated the revised rite of Mass, setting the first Sunday of Advent at the end of that year as the date on which it would enter into force. The revised Missal itself was not published until the following year, and full vernacular translations appeared much later. The document made particular mention of the following significant changes from the previous edition of the Roman Missal, most of which had been introduced on a provisional basis in the immediately preceding years: