Editing Pope Leo XIII (section)

====Thomism====
As pope, he used all his authority for a revival of the theology of [[Thomas Aquinas]]. On 4 August 1879, Leo XIII promulgated the encyclical ''[[Aeterni Patris]]'' ("Eternal Father"), which, more than any other single document, provided a charter for the revival of Thomism, the medieval theological system based on the thought of Aquinas – as the official philosophical and theological system of the Catholic Church. It was to be normative not only in the training of priests but also in the education of the laity at universities.

Pope Leo XIII later created the [[Pontifical Academy of St. Thomas Aquinas]] on 15 October 1879 and ordered the publication of the critical edition, the so-called [[Leonine Edition]], of the complete works of the ''doctor angelicus''. The superintendence of the Leonine edition was entrusted to [[Tommaso Maria Zigliara]], professor and rector of the ''Collegium Divi Thomae de Urbe'', the future [[Pontifical University of Saint Thomas Aquinas]], today called ''Angelicum''. Leo also founded the ''Angelicum's'' Faculty of Philosophy in 1882 and its Faculty of [[Canon law (Catholic Church)|Canon Law]] in 1896.{{Citation needed|date=June 2024}}