A few weeks ago Mass was offered at Saint Teresa's for the parish Praesidium (the name for a parish group of the Legion) as they began their Centenary year.
The Legion of Mary is an international association and was founded in Dublin, as a Roman Catholic Marian Movement by the layman and civil servant Frank Duff.
The spirituality of the Legion of Mary is essentially based on the approach of Louis de Montfort, as put forward in his True Devotion to Mary. The Legion promotes a "total dedication" to Christ through devotion to the Blessed Virgin Mary.
Another important element that shapes its spirituality is its devotion to the Holy Spirit. Frank Duff promoted the adoration of the third person of the Trinity, which he considered neglected. He saw the Virgin Mary as the "visible image" of the Spirit; the Legion's introductory prayers and Legion promise are directed to the Holy Spirit. The Legion's vexillium legionis (emblem) bears the Holy Spirit's image in the form of a dove.
The essential aim of the Legion of Mary is the sanctification of its members through prayer, the sacraments and devotion to Mary and the Trinity, and of the whole world through the apostolate of the legion.