The hypothesis of the article is that the liturgical assembly should be considered as a sacramental reality. Author begins by speaking about the experience of faith, using a distinction of Theobald. After identifying six constitutive elements of the experience of faith, it would be possible to interrogate them in an ecumenical Anglican–Catholic perspective. To come back to the question of the sacramentality of the assembly, Author use the reflections of Semmelroth, Rahner, and the Second Vatican Council.