Colloquium Marianum was an elite type of Marian sodality, founded by Jesuit Father Jakob Rem of the Jesuit Seminary at Ingolstadt in 1594 AD in Ingolstadt, Bavaria, with the aim to reach holiness of life through an ever-deeper love of the Virgin Mary.
[1] Membership in the Colloquium Marianum, an elite group within the Sodality of Our Lady, was based on a virtuous life, free of cardinal sins.
During the Thirty Years' War (1618-1648), the Colloquium Marianum contributed to the prayerful defence of the faith with thousands of male members.
During the Age of Enlightenment, and after the Jesuit Order was outlawed by Pope Clement XIV in 1773, the colloquium lost membership and gradually disappeared.
The Schönstatt movement and the Legion of Mary resurrected the idea of Father Rem successfully in the 20th century.