This book provides a timely and thorough examination of religious minorities in Europe, paying particular attention to the diversity within Christianity. Drawing on perspectives from Eastern, Central and Western Europe, with a focus on Germany, it examines the complex dynamics of religious life in minority contexts, offering essential insights into the role of faith communities in post-migrant societies. It investigates how sociological conditions shape religious practices and identities, how migration fosters adaptation and renewal, and the contributions of minority communities to multicultural and plural societies. Featuring contributions from leading scholars of theology, sociology and Islamic studies, this multidisciplinary book provides an in-depth analysis of the evolving landscape of religion in contemporary Europe. It therefore highlights the importance of ecumenical dialogue and interreligious encounters in an increasingly diverse society. This vital resource sheds light on the often overlooked role of religious minorities in shaping the cultural and religious future of Europe, and is essential reading for scholars, students, and practitioners.