Joseph Mueller, S.J.
Rev. Joseph G. Mueller, S.J., S.T.D.
Associate Professor

Joseph G. Mueller, S.J. (S.T.D., Centre Sèvres, Paris, 2005), [Systematics/Ethics], specializes in ecclesiology and early Christian theology, especially the Church order literature of the first five centuries and its Old Testament exegesis. His book, L'Ancien Testament dans l'ecclésiologie des Pères: Une lecture des Constitutions apostoliques, was published by Brepols in February 2005. He has recently published articles on priests in antiquity and early Christianity and presbyters in antiquity and early Christianity, both for Reallexikon für Antike und Christentum, as well as an article on the Christology and fundamental theology in the first volume of Benedict XVI’s trilogy on Jesus, for Nova et Vetera.  Forthcoming articles engage the following topics:  the Trinitarian theology of the Apostolic Constitutions (in press for Studia patristica), marriage and family in the church order literature, and a response to the recent Catholic-Pentecostal dialogue statement on charismatic gifts. He is working on a book-length treatment of the ancient Church order tradition. He plans on doing further study of why Christian ministers were called priests in the ancient Church, and he is interested in pursuing work on a theology of Church institutions. From 2008 until 2015 he worked as a member of the team representing the U.S. Conference of Catholic Bishops on the Faith and Order Commission of the National Council of Churches of Christ. He has taught the master’s-level introduction to systematic theology and doctoral courses on Augustine’s De Trinitate, on eschatology, and on fundamental theology, and he has directed research into early Christian ecclesiology.

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Theology Department Mission Statement


Marquette University defines itself as Christian, Catholic, Jesuit, urban, and independent. The Department of Theology functions within the university to investigate and understand the Catholic tradition, its relation to other Christian communions, and to other religions of the world. Read more of our mission statement.