The contribution of monasticism to Christian theology\u27s framework in almost all periods is undisputed. However, the eighteenth century as a period of monastic theology is still—unjustly—overlooked. That was precisely the time when monks, mostly Benedictines, challenged the traditional ways of theologizing and, along with a number of dedicated individuals, initiated what came to be called the Catholic Enlightenment.1 This movement worked not only for a renewal of ecclesiastical practice and thought, but also for a peaceful dialogue between the Christian churches and even toward an ecumenical theology. One of the most intriguing figures of this enlightened theology is the Swabian Benedictine Beda Mayr (1742-1794)—the forgotten grandfather of ecumenical theology