The Editio Leonina or Leonine Edition is the edition of the works of Saint Thomas Aquinas originally sponsored by Pope Leo XIII in 1879.
The Leonine Commission (Commissio leonina) is the group of scholars working on the ongoing project of critically editing the works of Aquinas. The first superintendent of the commission was Tommaso Maria Zigliara, professor and rector of the Collegium Divi Thomae de Urbe (the future Pontifical University of Saint Thomas Aquinas). Its current seat is in Paris, rue de la Glacière and it is currently (as of 2015) chaired by friar Adriano Oliva. The editions are published with editions du Cerf, the historical Dominican publishing house in France founded in 1929 at the request of Pope Pius XI.
Aquinas' main work, the Summa Theologiae , was edited in nine volumes (tt.IV–XII) during 1888–1906. As of 2014, the Editio Leonina comprises 39 volumes, representing about half of the entire scope of the project.
Robert Kilwardby was an Archbishop of Canterbury in England and a cardinal. Kilwardby was the first member of a mendicant order to attain a high ecclesiastical office in the English Church.
Peter John Olivi, also Pierre de Jean Olivi or Petrus Joannis Olivi, was a French Franciscan theologian and philosopher who, although he died professing the faith of the Roman Catholic Church, remained a controversial figure in the arguments surrounding poverty at the beginning of the 14th century. In large part, this was due to his view that the Franciscan vow of poverty also entailed usus pauper. While contemporary Franciscans generally agreed that usus pauper was important to the Franciscan way of life, they disagreed that it was part of their vow of poverty. His support of the rigorous view of ecclesiastical poverty played a part in the ideology of the groups coming to be known as the Spiritual Franciscans or Fraticelli.
The Summa contra Gentiles is one of the best-known treatises by Thomas Aquinas, written as four books between 1259 and 1265.
Albert of Saxony was a German philosopher and mathematician known for his contributions to logic and physics. He was bishop of Halberstadt from 1366 until his death.
Tommaso Maria Zigliara, OP was a Corsican priest of the Catholic Church, a member of the Dominicans, a theologian, philosopher and a cardinal.
The passive intellect, is a term used in philosophy alongside the notion of the active intellect in order to give an account of the operation of the intellect (nous), in accordance with the theory of hylomorphism, as most famously put forward by Aristotle.
Giovanni Dondi dell'Orologio, also known as Giovanni de' Dondi, was an Italian physician, astronomer and mechanical engineer in Padua, now in Italy. He is remembered today as a pioneer in the art of clock design and construction. The Astrarium, which he designed and built over a period of 16 years, was a highly complex astronomical clock and planetarium, constructed only 60 or so years after the very first all-mechanical clocks had been built in Europe, and demonstrated an ambitious attempt to describe and model the planetary system with mathematical precision and technological sophistication.
John of Paris, also called Jean Quidort and Johannes de Soardis, was a French philosopher, theologian, and Dominican friar.
Radulphus Brito was an influential grammarian and philosopher, based in Paris. He is usually identified as Raoul le Breton, though this is disputed by some. Besides works of grammatical speculation he wrote on Aristotle, Boethius and Priscian.
Matthew of Aquasparta was an Italian Friar Minor and scholastic philosopher. He was elected Minister General of the Order.
Contra errores Graecorum, ad Urbanum IV Pontificem Maximum is a short treatise written in 1263 by Roman Catholic theologian Saint Thomas Aquinas as a contribution to Pope Urban's efforts at reunion with the Eastern Church. Aquinas wrote the treatise in 1263 while he was papal theologian and conventual lector in the Dominican studium at Orvieto after his first regency as professor of theology at the University of Paris which ended in 1259 and before he took up his duties in 1265 reforming the Dominican studium at Santa Sabina, the forerunner of the Pontifical University of Saint Thomas Aquinas, Angelicum, in Rome.
The Corpus Scriptorum Ecclesiasticorum Latinorum (CSEL) is an academic series that publishes critical editions of Latin works by late-antique Christian authors.
Alexander of San Elpidio (1269–1326) was an Italian Augustinian.
Francesco Silvestri, O.P. was an Italian Dominican theologian. He wrote a notable commentary on Thomas of Aquinas's Summa contra gentiles, and served as Master General of his order from 1525 until his death.
Walter of Bruges was a Franciscan theologian, who flourished at the University of Paris 1267–1269.
The Medici Oriental Press was a press established by Ferdinand de Medici in the 16th century. This press produced some of the earliest books printed in Arabic. The press was active from 1584 to 1614.
Actus essendi is a Latin expression coined by Saint Thomas Aquinas (1225–1274). Translated as "act of being", the actus essendi is a fundamental metaphysical principle discovered by Aquinas when he was systematizing the Christian Neoplatonic interpretation of Aristotle. The metaphysical principle of actus essendi relates to the revelation of God as He Who is, and to how we as humans perceive God’s essence. Aquinas elaborates on the fact that God’s essence is not perceived as sense data; rather, the essence of God can only be understood partially in terms of the limited participations in God’s actus essendi, that is, in terms of what is real, in terms of God’s effects in the real world.
Dominic of Flanders was a French-Flemish Dominican philosopher and Scholastic author, known to have been a renowned Thomist. His commentaries on Aristotle and on Thomas Aquinas were frequently printed, the most famous being his commentary on Aristotle’s Metaphysics. This Commentaria is commonly known to have been dedicated to Lorenzo de’ Medici.
René Antoine Gauthier (1913–1999) was a French Dominican friar, philologist and historian of philosophy.