The Catholic Encyclopedia

“…all the clues converged upon one point, the preaching of the Dominican Alan de Rupe about the years 1470-75. He it undoubtedly was who first suggested the idea that the devotion of "Our Lady's Psalter" (a hundred and fifty Hail Marys) was instituted or revived by St. Dominic.”

“The authorship is now generally ascribed to Hermann Contractus… Durandus, in his "Rationale", ascribed it to Petrus of Monsoro (d. about 1000), Bishop of Compostella. It has also been attributed to Adhémar, Bishop of Podium (Puy-en-Velay), whence it has been styled "Antiphona de Podio" (Anthem of Le Puy).”

“…we may conclude that the Angelus in its origin was an imitation of the monks' night prayers and that it had probably nothing directly to do with the curfew bell.”

“It cannot be said with any certainty when such indulgences began to be granted, but most probably they may be due to the Franciscans, to whom in 1342 the guardianship of the holy places was entrusted.”

“But neither to Hilary nor to Ambrose may the hymn be prudently ascribed, because although both composed hymns, the Te Deum is in rhythmical prose, and not in the classical metres of the hymns known to have been written by them.”

“Sixtus V, who had entertained a singular devotion for Loreto, by the Bull "Reddituri" of 11 July, 1587, gave formal approval to it, as to the litany of the Holy Name of Jesus, and recommended preachers everywhere to propagate its use among the faithful.”

“This well-known prayer dates its origin from the first half of the fourteenth century and was enriched with indulgences by Pope John XXII in the year 1330.”

“The hymn has also been attributed to St. Ambrose and to St. Gregory the Great, but without real evidence for either ascription.”

“Of unknown authorship, the anthem has been traced back to the twelfth century. It was in Franciscan use, after Compline, in the first half of the following century.”

“The hexameter verses are credited to Hermannus Contractus, or Hermann "the Cripple" (d. 1054).”

“It is found in the St. Alban's Book of the twelfth century; in a Munich manuscript thought by Daniel to be of the thirteenth; in a Sarum Breviary of the fourteenth; and in York and Roman Breviaries of the fifteenth.”

“This makes probable the ascription to Stephen Langton (q.v.), made by a writer whom Cardinal Pitra thinks an English Cistercian who lived about the year 1210. More probable is the ascription to Innocent III made by Ekkehard V in his "Vita S. Notkeri", written about 1220.”

“Throughout the Middle Ages it was generally believed that the Apostles, on the day of Pentecost, while still under the direct inspiration of the Holy Ghost, composed our present Creed between them, each of the Apostles contributing one of the twelve articles. This legend dates back to the sixth century.”

“…the opinion that St. Athanasius was not its author. His reasons may be reduced to the two following: firstly, no early writer of authority speaks of it as the work of this doctor; and secondly, its language and structure point to a Western, rather than to an Alexandrian, origin.”

“The former, in unrhymed verse, is generally credited to St. Venantius Fortunatus (6 cent.), and the latter, in rhymed accentual rhythm, was composed by St. Thomas Aquinas (13 cent.).”

“The opening words of the hymn for Matins of Corpus Christi and of the Votive Office of the Most Blessed Sacrament, composed by St. Thomas Aquinas.”

“The hymn is assigned to Lauds of Corpus Christi and is commonly ascribed to St. Thomas Aquinas.”

“…the sequence composed by St. Thomas Aquinas, about the year 1264, for the Mass of Corpus Christi.”

“Finally, the petition "Holy Mary, Mother of God, pray for us sinners now and at the hour of our death. Amen." is stated by the official "Catechism of the Council of Trent" to have been framed by the Church itself.”