Friedrich Bernard Christian Maassen
United Sees of Macerata and Tolentino
Vicariate Apostolic of Mackenzie
Marie-Edmé-Patrice-Maurice de MacMahon
Joseph-Anna-Marie de Moyria de Mailla
François-Pierre-Gonthier Maine de Biran
Françoise, Marquise de Maintenon
Joseph-Marie, Comte de Maistre
Marcellinus of Civezza, O.F.M.
Margaret of the Blessed Sacrament
Prefecture Apostolic of Mariana Islands
Congregation of the Missionaries of Mariannhill
Sts. Maris, Martha, Audifax, and Abachum
Lucius Perpetuus Aurelianus Marius Maximus
Vicariate Apostolic of Marquesas Islands
Moral and Canonical Aspect of Marriage
Diocese of Marseilles (Massilia)
Vicariate Apostolic of the Marshall Islands
Diocese of Marsico Nuovo and Potenza
Luigi Ferdinando, Count de Marsigli
Missionaries of the Company of Mary
Servants of Mary (Order of Servites)
Society of Mary (Marist Fathers)
St. Mary Frances of the Five Wounds of Jesus
Richard Angelus a S. Francisco Mason
Devises and Bequests for Masses (United States)
Feast of the Maternity of the Blessed Virgin Mary
Marcus Aurelius Valerius Maximianus
Caius Julius Verus Maximinus Thrax
Prefecture Apostolic of Mayotte, Nossi-Bé, and Comoro
Charles Joseph Eugene de Mazenod
Abbey and Congregation of Melk
Vicariate Apostolic of Méndez and Gualaquiza
Francisco Sarmiento de Mendoza
Corporal and Spiritual Works of Mercy
Sisters of Mercy of St. Borromeo
Frédéric-François-Xavier Ghislain de Mérode
Delegation Apostolic of Mesopotamia, Kurdistan, and Armenia
Metal-Work in the Service of the Church
Prince Klemens Lothar Wenzel von Metternich
Francis, Joseph, and Paul Mezger
Military Orders of St. Michael
Giovanni Francesco Pico della Mirandola
Congregation of the Sisters of Misericorde
Prefecture Apostolic of Misocco and Calanca
Congregation of Priests of the Mission
Congregation of Missionaries of St. Charles Borromeo
Missionaries of St. Francis de Sales of Annecy
Missionary Society of St. Paul the Apostle
Mission Indians (of California)
Catholic Indian Missions of Canada
Catholic Indian Missions of the United States
François-Napoléon-Marie Moigno
Diocese of Molfetta, Terlizzi, and Giovinazzo
Jean-Baptiste Poquelin Molière
Principality and Diocese of Monaco
Canonical Erection of a Monastery
Monophysites and Monophysitism
Monothelitism and Monothelites
Montagnais Indians (Chippewayans)
Charles-Forbes-René, Comte de Montalembert
Marquis de Louis-Joseph Montcalm-Gozon
Diocese of Monterey and Los Angeles
Charles-Louis de Secondat, Baron de Montesquieu
Anne, First Duke of Montmorency
Alexis-François Artaud de Montor
Antoine-Jean-Baptiste-Robert Auget, Baron de Montyon
Dioceses of Mostar and Markana-Trebinje
Feast of the Most Pure Heart of Mary
Toribio de Benavente Motolinia
Congregations of Mount Calvary
Feast of Our Lady of Mount Carmel
Karl Ernst, Freiherr von Moy de Sons
Johann Chrysostomus Wolfgang Amadeus Mozart
St. Clair Augustine Mulholland
Baron Eligius Franz Joseph von Münch-Bellinghausen
Archdiocese of Munich-Freising
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 frequenty 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:
R. Maere.