Msgr. Irwin's Latest Publications The Vatican Congregation for Divine Worship has published Msgr. Irwin's major address delivered in Rome in February 2013 at the Lateran University: "The Theological Keys of Sacrosanct Concilium, Reflections and Proposals," in Sacrosanttum Concilium. Gratudine e Impegno per un grande Movimento di Communion Ecclesiale. (Vatican: Libreria Editrice Vaticana, 2015) 81-118, ed. Juan Miguel Ferrer Grenesche."Introduction" to LAUDATO SI: On Care For Our Common Home. (New York/Mahwah: Paulist Press, 2015).