The article focuses on the idea of the “margins” and “peripheries” of the Church, as recently referenced in the speeches of Pope Francis, and connects this idea with the ecclesiology of Vatican II’s pastoral constitution, Gaudium et spes. A “rediscovery” of this constitution can inject new meaning into the sense of “marginality” of the Church in today’s world. “Marginality” need not be a condition imposed from without, and should not be identified with irrelevance.