How has the Christian movement grown and changed in the last five hundred years? From Luther to Tillich and the Virgin Mary, from Protestant initiatives and Catholic dialogues, from Charles Taylor to progressive Christianity, this book runs the gamut. The urgency of ecology, the sacramentality of foot-washing, the complexities of biblical interpretation, the theology of the cross, and the ongoing work of reformation are all under the microscope. A distinctively ecumenical project, this book presents a variety of perspectives on these pressing questions, drawing together authors from the Anglican, Baptist, Lutheran, Roman Catholic, United Church of Canada traditions, and more. Each contributor provides unique insights into Christianity's ongoing processes of re-forming as contexts and circumstances change. Readers will find resonances of the familiar interwoven with new research about the project of ecumenical Christianity.