The University of Dayton was founded by the Society of Mary in 1850. The brothers and priests of the Society of Mary are part of a worldwide Marianist family of Catholic brothers, priests, sisters and committed lay people.
The Society of Mary was founded in 1817 by Blessed William Joseph Chaminade (1761-1850), a priest in the diocese of Bordeaux, France. The Society of Mary is the male religious branch of the Marianist Family. Working closely with Father Chaminade in founding the Marianist Family were Marie Thérèse Charlotte de Lamourous (1754-1836). She was a close friend of Fr. Chaminade and collaborated with him in the establishment of the Sodality of the Madeleine, the lay branch of the Marianist family. Adèle de Batz de Trenquelléon (1789-1828), foundress of the Marianist Sisters and foundress of the Association, also worked closely with Fr. Chaminade.
When the church of France lay dismembered and dispirited in the ashes of the French Revolution, these three founders of the Marianist Family — largely unaware of each other's work at the beginning, but then joining forces — formed communities called sodalities. These communities included both sexes, married and single people, religious, diocesan clergy and all classes of people. These were the faith communities that would help rebuild the Catholic church in France.
Eventually, some sodality members formed the nucleus of two religious congregations: for women, the Daughters of Mary Immaculate, the Marianist Sisters, (founded by Adèle de Batz de Trenquelléon in collaboration with Fr. Chaminade in 1816) and for men, the Society of Mary (founded in 1817).
As Mary had formed Jesus, she would now form new apostles to live the Gospel in a new age.
The Society of Mary was established in the U.S. in 1849 in Dayton. The Marianist Sisters were established in the US. in 1949 in Somerset, Texas.