A collection of essays dedicated to the memory of Dom Bede Winslow, a leading pioneer of the ecumenical movement and founder of the journal Eastern Churches Quarterly. This book explores in-depth the theology, history, and spiritual traditions of the Orthodox and Eastern Catholic Churches. Published just as the Second Vatican Council was underway, it highlights the need for the Western Church to better understand, appreciate, and foster dialogue with Eastern Christianity in order to advance ecclesial reconciliation and unity.