Joris Geldhof is Catherine F. Huisking Professor of Theology at the University of Notre Dame. He previously served as professor of liturgical studies and sacramental theology at the Catholic University of Leuven, Belgium. He is the author of Liturgy and Secularism: Beyond the Divide (Liturgical Press, 2018), Liturgical Theology as a Research Program (Brill, 2020), and Monotheism in Christian Liturgy (Cambridge University Press, 2023). Joris is also a past president of the international ecumenical Societas Liturgica and a member of the Malines Conversations Group. Samuel Goyvaerts is associate professor of liturgical studies and sacramental theology at the Tilburg School of Catholic Theology (TST), Tilburg University, The Netherlands. Recent publications of Goyvaerts are on pastoral liturgy, liturgical formation, and the relation between liturgy and church architecture. Goyvaerts also serves as vice-dean for education at his faculty, is a board member of Societas Liturgica, the Liturgical Institute, the Institute for Ritual and Liturgical Studies (IRiLiS) and co-editor of the international peer-reviewed journal Questions Liturgiques. Tom McLean is a doctoral candidate in the faculty of theology and religious studies at KU Leuven, Belgium, writing his dissertation on the development of the sacramental theology of Edward Schillebeeckx. Recent publications have appeared in Louvain Studies, Questions Liturgiques, and The Heythrop Journal.