What is the church? What makes the church church? In this volume, theologian Veli-Matti Krkkinen provides an up-to-date survey and analysis of the major ecclesiological traditions, the most important theologians, and a number of contextual approaches that attempt to answer these essential questions. Drawing on his international experience, global research and ecumenical awareness, Krkkinen presents an overview of both traditional and contemporary expressions of the Christian church. An Introduction to Ecclesiology will richly reward the student, pastor or layperson who is looking for a comprehensive and insightful overview of the unity and diversity of understandings and practices within the one church of Jesus Christ.