‘Postsecular’ society is becoming a more and more widespread keyword in contemporary debates, within the philosophical as well as the sociological domains. Even if the word is not so new, it has gained a new conceptual relevance and specificity as a consequence of a deep scrutiny of classical theories of secularization. The paper takes for granted debates on theories of secularization, and tries to contribute to the clarification of the still vague notion of ‘postsecular society’, so far symptom of weaknesses of theories of secularization, or of a normative need for a fairer recognition of religious traditions in our liberal institutions. Working on Jürgen Habermas and Adam B. Seligman’s different but complementary theories of modernity, the paper tries to suggest a four-cells model to typify relationships between religious traditions and modernity, making more specific the constituive elements of the postsecular society.