Plenary Indulgence for the Centenary of the Legion of Mary

To increase the holiness of the faithful and for the salvation of souls, by virtue of the faculty granted to it in a special way by the Most Reverend Father in Christ and Our Master, the Lord Francis, by Divine Providence, Pope, having taken note of the requests made by Mary Murphy, President of the Association called the Legion of Mary, on the occasion of its one hundredth anniversary, the Apostolic Penitentiary graciously concedes from the heavenly treasures of the Church a plenary indulgence properly fulfilled under the usual conditions ...

See the full text of the indulgence here