Santa Cecilia in Trastevere in the context of "Abbey"

The Roman Rite (Latin: Rītus Rōmānus) is the most common ritual family for performing the ecclesiastical services of the Latin Church, the largest of the sui iuris particular churches that comprise the Catholic Church. The Roman Rite governs rites such as the Roman Mass and the Liturgy of the Hours as well as the manner in which sacraments and blessings are performed.

The Roman Rite developed in the Latin language in the city of Rome and, while distinct Latin liturgical rites such as the Ambrosian Rite remain, the Roman Rite has gradually been adopted almost everywhere in the Latin Church. In medieval times there were numerous local variants, even if all of them did not amount to distinct rites, yet uniformity increased as a result of the invention of printing and in obedience to the decrees of the Council of Trent of 1545–1563 (see Quo primum). Several Latin liturgical rites which had survived into the 20th century were abandoned after the Second Vatican Council. The Roman Rite is now the most widespread liturgical rite not only in the Catholic Church but in Christianity as a whole.

Saint Cecilia (Latin: Sancta Caecilia), also spelled Cecelia, was a Roman Christian virgin martyr, who is venerated in Catholic, Orthodox, Anglican, and some Lutheran churches, such as the Church of Sweden. She became the patroness of music and musicians, it being written that, as the musicians played at her wedding, Cecilia "sang in her heart to the Lord". Musical compositions are dedicated to her, and her feast, on 22 November, is the occasion of concerts and musical festivals. She is also known as Cecilia of Rome.

Saint Cecilia is one of several virgin martyrs commemorated by name in the Canon of the Mass in the Latin Church. The church of Santa Cecilia in Trastevere, founded in the 3rd century by Pope Urban I, is believed to be on the site of the house where she lived and died.

Pelagio Galvani (c. 1165 – 30 January 1230, Portuguese: Paio Galvão Latin: Pelagius) was a Leonese cardinal, and canon lawyer. He became a papal legate and leader of the Fifth Crusade.

Born at Guimarães, his early life is little known. It is repeatedly claimed that he entered the Order of Saint Benedict but this is not proven. Pope Innocent III created him cardinal-deacon of Santa Lucia in Septisolio around 1206. Later, he was promoted to the rank of cardinal-priest of S. Cecilia (probably on 2 April 1211), and finally opted for the suburbicarian see of Albano in the spring of 1213. He subscribed the papal bulls between 4 May 1207 and 26 January 1230. He was sent on a diplomatic mission to Constantinople in 1213. During this two-year mission he attempted to close Orthodox churches and imprison the clergy, but this caused such domestic upset that Henry of Flanders, the Latin Emperor of Constantinople, reversed his actions which had caused the "tempest which held the city of Constantine in its grip", as noted a contemporary historian. Three years later he was elected Latin Patriarch of Antioch but his election was not ratified by the Holy See. He was dispatched in 1218 by Pope Honorius III to lead the Fifth Crusade at Damietta in Egypt, and made a poor strategic decision in turning down favourable peace offers made by the sultan al-Kamil. During his absence, the see of Albano was administer by Thomas of Capua.

Pietro Cavallini (c. 1240 – c. 1330) was an Italian artist active during the late Middle Ages. His most famous surviving works include the Last Judgment fresco at Santa Cecilia in Trastevere, the Life of the Virgin Mary mosaic cycle at Santa Maria in Trastevere, and a several frescos in San Domenico Maggiore. Despite his prolific career, much of Cavallini’s oeuvre has been lost and is known today, albiet tentatively, only through fragments, written descriptions, or stylistic attributions.