People observe and transgress religious borders when they relate with faith and other faiths, when they shape communities, when they make decisions. A group of researchers have joined an inquiry into the forces of religious closure and openness in present-day Central and Eastern Europe. Sociology, political science and history are triangulated to render a clear understanding of the individual experiences of religion and secularity, and of the strategic choices of religious and political elites, taking readers along an exploration of religious identity and otherness.