Dominican Order in the context of "Decretals of Gregory IX"

Thomas Aquinas OP (/əˈkwaɪnəs/ ə-KWY-nəs; Italian: Tommaso d'Aquino, lit. 'Thomas of Aquino'; c. 1225 – 7 March 1274) was an Italian Dominican friar and priest, the foremost Scholastic thinker, as well as one of the most influential philosophers and theologians in the Western tradition. A Doctor of the Church, he was from the county of Aquino in the Kingdom of Sicily.

Thomas was a proponent of natural theology and the father of a school of thought (encompassing both theology and philosophy) known as Thomism. He argued that God is the source of the light of natural reason and the light of faith. He embraced several ideas put forward by Aristotle and attempted to synthesize Aristotelian philosophy with the principles of Christianity. He has been described as "the most influential thinker of the medieval period" and "the greatest of the medieval philosopher-theologians". Thomas Aquinas's philosophy influenced modern virtue ethics, aesthetics, and cognitive theory. He has been criticized, notably by Bertrand Russell, for seeking to justify conclusions already dictated by faith rather than follow reason independently.

Santa Maria delle Grazie (English: "Holy Mary of Grace") is a church and Dominican convent in Milan, northern Italy, and a UNESCO World Heritage Site. The convent contains the mural of The Last Supper by Leonardo da Vinci, which is in the refectory.

The calendar of saints is the traditional Christian method of organizing a liturgical year by associating each day with one or more saints and referring to the day as the feast day or feast of said saint. The word "feast" in this context does not mean "a large meal, typically a celebratory one", but instead "an annual religious celebration, a day dedicated to a particular saint".

The system rose from the early Christian custom of commemorating each martyr annually on the date of their death, their birth into heaven, a date therefore referred to in Latin as the martyr's dies natalis ('day of birth'). In the Eastern Orthodox Church, a calendar of saints is called a Menologion. "Menologion" may also mean a set of icons on which saints are depicted in the order of the dates of their feasts, often made in two panels.

William of Moerbeke, O.P. (Dutch: Willem van Moerbeke; Latin: Guillelmus de Morbeka; 1215–35 – c. 1286), was a prolific medieval translator of philosophical, medical, and scientific texts from Greek into Latin, enabled by the period of Latin rule of the Byzantine Empire. His translations were influential in his day, when few competing translations were available, and are still respected by modern scholars.

Albertus Magnus OP (c. 1200 – 15 November 1280), also known as Saint Albert the Great, Albert of Swabia, Albert von Bollstadt, or Albert of Cologne, was a German Dominican friar, philosopher, scientist, and bishop. He is considered one of the greatest medieval philosophers and thinkers.

Canonized in 1931, he was known during his lifetime as Doctor universalis and Doctor expertus; late in his life the sobriquet Magnus was appended to his name. Scholars such as James A. Weisheipl and Joachim R. Söder have referred to him as the greatest German philosopher and theologian of the Middle Ages. The Catholic Church distinguishes him as one of the Doctors of the Church.

Fra Angelico, O.P. (/ˌfrɑː ænˈdʒɛlɪkoʊ/ FRAH an-JEL-ik-oh, Italian: [ˈfra anˈdʒɛːliko]; born Guido di Pietro; c. 1395 – 18 February 1455) was a Dominican friar and Italian Renaissance painter of the Early Renaissance, described by Giorgio Vasari in his Lives of the Artists as having "a rare and perfect talent." He earned his reputation primarily for the series of frescoes he made for his own friary, San Marco, in Florence, then worked in Rome and other cities. All his known work is of religious subjects.

He was known to contemporaries as Fra Giovanni da Fiesole ("Friar John of Fiesole") and Fra Giovanni Angelico ("Angelic Brother John"). In modern Italian, he is called Beato Angelico ("Blessed Angelic One"); the common English name Fra Angelico means the "Angelic Friar."

John Christopher "Aidan" Nichols OP (born 17 September 1948) is an English academic and Catholic priest.

Nichols served as the first John Paul II Memorial Visiting Lecturer at the University of Oxford for 2006 to 2008, the first lectureship of Catholic theology at that university since the Protestant Reformation. He is a member of the Order of Preachers (Dominicans) residing in the Priory of St Dominic in London, England.

A friar is a member of one of the mendicant orders in the Catholic Church. There are also friars outside of the Catholic Church, such as within the Evangelical-Lutheran Churches and Anglican Communion. The term, first used in the 12th or 13th century, distinguishes the mendicants' itinerant apostolic character, exercised broadly under the jurisdiction of a superior general, from the older monastic orders' allegiance to a single monastery formalized by their vow of stability. A friar may be in holy orders or be a non-ordained brother. The most significant orders of friars are the Dominicans, Franciscans, Augustinians, and Carmelites.

Portuguese Timor (Portuguese: Timor Português) was a Portuguese colony on the territory of present-day East Timor from 1702 until 1975. During most of this period, Portugal shared the island of Timor with the Dutch East Indies (now Indonesia)

The first Europeans to arrive in the region were the Portuguese in 1515. Dominican friars established a presence on the island in 1556, and the territory was declared a Portuguese colony in 1702. Following the beginning of the Carnation Revolution (a Lisbon-instigated decolonisation process) in 1975, East Timor was invaded by Indonesia. However, the invasion was not recognised as legal by the United Nations (UN), which continued to regard Portugal as the legal Administering Power of East Timor. The independence of East Timor was finally achieved in 2002 following a UN-administered transition period.