Encyclopedias, Almanacs, Transcripts, and Maps
- Missionary Sisters of St. Peter Claver
- Missionary Sisters of the Holy Rosary
- Missionary Sisters of the Most Sacred Heart of Jesus of Hiltrup
- Missionary Sisters of the Precious Blood
- Missionary Sisters of the Sacred Heart
- Missionary Society of St. James the Apostle
- Missions, Divine
- Mississippi, Catholic Church in
- Missouri Mormons
- Missouri Mormons
- Missouri, Catholic Church in
- Mitchell, Yvonne
- Miter
- Mithras and Mithraism
- Mithredath
- Mithridates, Flavius
- Mitin, Mark Borisovich
- Mitnaggedim
- Mittarelli, Giovanni Benedetto
- Mittwoch, Eugen