Religious secularization cannot be a template indicator of European religious life. There is a continuous concern about identifying new forms of measuring the presence of religious fact in the public sphere, where religion can be visible without manifesting itself according to the specific norms of dogma and ritual. More precisely, we refer to the public space intended for advertising, especially promoting marketing products on the competitive market of material or symbolic or immaterial products, where an immediate or short-term economic benefit is sought. Religious communication in public space is diverse, both in commercial marketing and political communication, as well as in symbolic and cultural competitive communication. A careful analysis of the presence of religious communication in public space, over a more extended time than a few years, will allow us, through scientific intuition, to issue a series of conclusions regarding the fluid relationship of the religious fact with the public sphere of contemporary society. It also helps us to understand the new relationships of mutual influence between religious facts and the modernity of modern society. By creating a typology of the various forms of public communication, religiously structured in public space, one can more easily understand the intensity and influence of religious secularization. Our analysis will be specific to religious sciences and proposes, as a case study, to analyse the fluidity of the religious fact in public space in contemporary Romania.