Editing Council of Trent (section)

=== Practical ===
On the language of the Mass, "contrary to what is often said", the council condemned the insistence that only vernacular languages must be used, while affirming on the use of Latin for the [[Roman rite]].<ref name="O'Malley, 31">O'Malley, 31</ref> However, elements of the [[Pre-Tridentine Mass#Vernacular and laity in the medieval and Reformation eras|Prône]], the vernacular [[Catholic catechesis|catechetical]] preaching service common in the medieval High Mass (and some extra-liturgical situations)<ref>{{cite web |title=Prône {{!}} Encyclopedia.com |url=https://www.encyclopedia.com/religion/encyclopedias-almanacs-transcripts-and-maps/prone |website=www.encyclopedia.com}}</ref>  became mandatory for Sundays and feast days (fifth session, chapter 2).<ref>{{cite journal |last1=Lualdi |first1=Katharine J. |title=Persevering in the Faith: Catholic Worship and Communal Identity in the Wake of the Edict of Nantes |journal=The Sixteenth Century Journal |date=2004 |volume=35 |issue=3 |pages=717–734 |doi=10.2307/20477042 |jstor=20477042 |url=https://www.jstor.org/stable/20477042 |issn=0361-0160}}</ref>{{rp|728}}

The council appointed, in 1562 (eighteenth session), a commission to prepare a list of forbidden books (''[[Index Librorum Prohibitorum]]''), but it later left the matter to the Pope. The preparation of a [[Roman Catechism|catechism]] and the revision of the [[Roman Breviary|Breviary]] and [[Missal]] were also left to the pope.<ref name=Schaff-Herzog/> The catechism embodied the council's far-reaching results, including reforms and definitions of the sacraments, the Scriptures, church dogma, and duties of the clergy.<ref name="World History" />