Dennis Billy, C.Ss.R.

Dennis Billy, C.Ss.R. is Karl Rahner Professor of Catholic Theology. He is an American Redemptorist of the Baltimore Province. He comes from Staten Island, New York, and was educated there through high school in local Catholic schools. He holds an A.B. in English from Dartmouth College (Hanover, New Hampshire) and studied for the priesthood in the Redemptorist seminary system. After his priestly training, he went on to earn a Th.D. in Church History from Harvard University, a M.A. in Medieval Studies from the University of Toronto, an M.M.R.Sc. in Moral Theology from the Katholieke Universiteit of Leuven in Belgium, an S.T.D. in Spirituality from The Pontifical University of St. Thomas (Angelicum, Rome), and a D.Min. in Spiritual Direction from the Graduate Theological Foundation. In 2016, he delivered the Lord Robert Runcie Convocation Lecture at the Graduate Theological Foundation and was inducted as a Fellow in appreciation of his scholarly contributions as Karl Rahner Professor of Catholic Theology. For more than 20 years Father Billy was Professor of the History of Moral Theology and Christian Spirituality at the Accademia Alfonsiana of The Pontifical Lateran University in Rome. From 2008-2016, he also served as scholar-in-residence, professor, and holder of the John Cardinal Krol Chair of Moral Theology at St. Charles Borromeo Seminary, Overbrook in Wynnewood, Pennsylvania.  He presently serves at Notre Dame Retreat House in Canandaigua, NY.  Father Billy has authored more than 30 books and published over 300 articles in a variety of scholarly and popular journals.  He is also very active in retreat work and in the ministry of spiritual direction.

Religious Affiliation
  • Roman Catholic (Priest)
General Areas of Interest
  • Theology; Spirituality
  • Spiritual Direction
  • Ecclesiastical History
Specialized Areas
  • Catholic Moral Theology
  • Christian Spirituality
  • Spiritual Direction

Areas of Service


  • Latin
  • French
  • Italian
Video and Audio Courses
E-Tutorial Offering
Dr. Billy's courses are offered from September to May of each year.
  • The Christian Ministry of Spiritual Direction
  • Fundamental Moral Theology
  • Mystical Theology
  • The Theology of Karl Rahner

 Faculty Contact