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Dominican theologian and historian, born at Chios in the Archipelago, 4 December, 1713; died at Corneto, near Montefiascone, Italy, 7 June, 1792. At the age of sixteen he entered the convent of Chios and passed later to St. Mark's at Florence and the Minerva at Rome. In 1740 he was appointed professor of physics in the Sapienza, and in 1743 taught philosophy at the Propaganda. His residence at Florence and Rome brought him into contact with brilliant men of his order, e.g. Orsi, Divelli, and Concina, and greatly facilitated his progress in his studies. He collaborated with Orsi in his "De Romani pontificis in synodos oecumenicas et earum canones potestate". Soon Benedict XIV appointed him prefect of the Casanatensian Library, master of theology and consultor of the Congregation of the Index. Owing to his office he had to take part in the controversy between the Appellants (Jansenists) and the Jesuits, and displayed an impartiality which greatly increased the difficulties of his anxious and laborious position. He engaged in lively theological controversies with Mansi and Cadonici. He had, likewise, to intervene in the controversy concerning the beatification of Blessed Palafox. In a published writing on this question, he dealt severely with the Jesuit party who opposed the beatification; but he was not less energetic in dealing with their opponents, the Appellants and Jansenist Church of Utrecht. He was director of the ecclesiastical journal of Rome (1742-85), and established at his residence a reunion of the learned Roman society.
Mamachi was a zealous supporter of the power of the Roman Pontiff. Involved in all the controversy of the day, he was one of the first to take issue with Febronius. Pius VI made him secretary of the Index (1779) and afterwards Master of the Sacred Palace, and frequently availed himself of his advice and of his pen. Mamachi's great work was to have been his "Christian Antiquities", but his labours in the field of dogma and jurisprudence absorbed so much of his time that he published only four of the twenty books that he planned. Moreover, he lived in an age when the good method inaugurated by Bosio had been abandoned and, considered as an archaeological work, the synthesis which he had projected is valueless. A second edition, however, appeared in 1842-1851. His chief writings are:
APA citation. (1910). Thomas Maria Mamachi. In The Catholic Encyclopedia. New York: Robert Appleton Company. http://www.newadvent.org/cathen/09578a.htm
MLA citation. "Thomas Maria Mamachi." The Catholic Encyclopedia. Vol. 9. New York: Robert Appleton Company, 1910. <http://www.newadvent.org/cathen/09578a.htm>.
Transcription. This article was transcribed for New Advent by Joseph P. Thomas. In Memory of Fr. Sebastine Karethedomy.
Ecclesiastical approbation. Nihil Obstat. October 1, 1910. Remy Lafort, Censor. Imprimatur. +John M. Farley, Archbishop of New York.
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