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Theologian, b. in London, 30 April, 1811; d. at Dublin, 10 November, 1878. Educated at Clongowes and Maynooth, he made his theological studies at Rome, where after seven years in the Roman College he gained the decree of Doctor of Divinity by a "public act" de iniversa theologia. After his ordination in 1838 he taught theology for thirteen years at Maynooth into which he was mainly instrumental in introducing the Roman spirit and tradition, after which he entered the Jesuit novitiate at Naples. He taught theology for some years at St. Beuno's College in North Wales till he was appointed Professor of Theology under Newman in the Catholic University of Ireland. During the remainder of his life he resided at Milltown Park near Dublin as rector of a House of Spiritual ; and he was Provincial of Ireland 1863-70. Constantly consulted on theological questions by the bishops and priests of Ireland, Cardinal Newman in his famous "Letter to the Duke of Norfolk" calls him "a great authority" and "one of the first theologians of the day". Dr. W.G. Ward, editor of "The Dublin Review", said: "It is a great loss to the Church that so distinguished a theologian as Father O'Reilly has published so little". Dr. Ward wrote of his chief work, "The Relations of the Church to Society ", "Whatever is written by so able and so solidly learned a theologian, one so docile to the Church and so fixed in the ancient theological paths, cannot but be of signal benefit to the Catholic reader in these anxious and perilous times."


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The Catholic Encyclopedia is the most comprehensive resource on Catholic teaching, history, and information ever gathered in all of human history. This easy-to-search online version was originally printed in fifteen hardcopy volumes.

Catholic Encyclopedia

Designed to present its readers with the full body of Catholic teaching, the Encyclopedia contains not only precise statements of what the Church has defined, but also an impartial record of different views of acknowledged authority on all disputed questions, national, political or factional. In the determination of the truth the most recent and acknowledged scientific methods are employed, and the results of the latest research in theology, philosophy, history, apologetics, archaeology, and other sciences are given careful consideration.

No one who is interested in human history, past and present, can ignore the Catholic Church, either as an institution which has been the central figure in the civilized world for nearly two thousand years, decisively affecting its destinies, religious, literary, scientific, social and political, or as an existing power whose influence and activity extend to every part of the globe. In the past century the Church has grown both extensively and intensively among English-speaking peoples. Their living interests demand that they should have the means of informing themselves about this vast institution, which, whether they are Catholics or not, affects their fortunes and their destiny.

Copyright © Catholic Encyclopedia. Robert Appleton Company New York, NY. Volume 1: 1907; Volume 2: 1907; Volume 3: 1908; Volume 4: 1908; Volume 5: 1909; Volume 6: 1909; Volume 7: 1910; Volume 8: 1910; Volume 9: 1910; Volume 10: 1911; Volume 11: - 1911; Volume 12: - 1911; Volume 13: - 1912; Volume 14: 1912; Volume 15: 1912

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