Pius V, Pius V

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Accordingly, in order to implement a decision of that council, he standardized the Holy Mass by promulgating the 1570 edition of the Roman Missal. Pope Pius V made this Missal mandatory throughout the Latin rite of the Catholic Church, except where a Mass liturgy dating from before 1370 was in use. This form of the Mass remained essentially unchanged for 400 years until Pope Paul VI's revision of the Roman Missal in 1969/1970, after which it has become widely known as the Tridentine Mass; use of the last pre-1969 edition of the Missal, that by Pope John XXIII in 1962, is permitted without limitation for private celebration of the Mass and is allowed also, under certain conditions, for public use, as laid down in the motu proprio Summorum Pontificum . Some continue to use even earlier editions, but without authorization.

It is attested in his canonization that he miracously knew when the battle was over, himself being in Rome at the time. Three national synods were held during his pontificate at Naples under Cardinal Alfonso Caraffa (whose family had, after inquiry, been reinstated by Pius V), at Milan under Saint Charles Borromeo, and at Machim.

In 1696, the process of Pius's canonisation was started through the efforts of the Master of the Order of Preachers, Antonin Cloche. He also immediately commissioned a representative tomb from the sculptor Pierre Le Gros the Younger to be erected in the Sistine Chapel of the Basilica di Santa Maria Maggiore. The pope's body was placed in it in 1698. St Pius V was beatified by Pope Clement X in the year 1672, and was later canonized by Pope Clement XI (1700–1721) on 24 May 1712.

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