One Baptism-One Church?

Kimberly Hope Belcher is associate professor of theology at the University of Notre Dame, in liturgical studies. She uses sacramental and liturgical theology and ritual theory to study Christian worship. She represents the United States Conference of Catholic Bishops on the Methodist-Catholic, Episcopal-Catholic, and Pentecostal-Catholic dialogues in the United States. Her related publications include "Ritual Techniques in Affliction Rites and the Lutheran-Catholic ecumenical Liturgy of Lund, 2016" (Yearbook for Ritual and Liturgical Studies, 2022), "Ritual Systems: Prostration, Self, and Community in the Rule of Benedict" (Ecclesia Orans, 2020), and Eucharist and Receptive Ecumenism: From Thanksgiving to Communion (Cambridge, 2020).

Nathan P. Chase (1990-2025) was assistant professor of liturgical and sacramental theology at Aquinas Institute of Theology in St. Louis, Missouri. He contributed articles to the field of liturgical studies, including pieces on liturgy in the early Church, initiation, the Eucharist, inculturation, and the Western Non-Roman Rites, particularly the Hispano-Mozarabic tradition. With Maxwell E. Johnson, he co-authored The Apostolic Tradition: Its Origins, Development, and Liturgical Practices (Liturgical Press, 2025), and The Origins of the Canons of Hippolytus (Liturgical Press, 2024). He was the author of The Homiliae Toletanae and the Theology of Lent and Easter (Peeters, 2020) and The Anaphoral Tradition in the 'Barcelona Papyrus' (Brepols, 2023).

Alexander Turpin is a Roman Catholic priest of the Diocese of Rockville Centre, New York, and a doctoral candidate in liturgical studies at The Catholic University of America in Washington, D.C. His dissertation focuses on the reception of non-Orthodox Christians into the Eastern Orthodox Church. Other scholarly interests include liturgical reform and renewal as well as liturgical history, especially in the Roman and Byzantine traditions. Some of his recent publications on these topics are "The Tridentine Genius of Traditionis Custodes" (Ecclesia Orans, 2021), "The Archaeology of Tradition: Theological Implications of Liturgiewissenschaft" (Antiphon, 2023), and "The Super Oblata Euchology of the Early Roman Mass: Divine-Human Exchange in a Local Eucharist" (Ecclesia Orans, 2024).