Joris Geldhof is Professor of Liturgy and Sacramental Theology in the Faculty of Theology and Religious Studies at the Catholic University of Leuven, Belgium. The past President of the international ecumenical Societas Liturgica, he is the author of Liturgy and Secularism: Beyond the Divide (2018), Liturgical Theology as a Research Program (2020) and Monotheism in Christian Liturgy (2023).