The Byzantine Empire - the Christianized Roman Empire - defined itself in terms of correct theological belief, 'orthodoxy'. This book discusses how orthodoxy was defined; how orthodoxy was expressed in art and the music of the liturgy; and how it helped shape the Byzantine Empire's sense of its own identity. '... this volume is a welcome collection of careful research and clear expression on the orthodoxies we usually fail to recognize, whether in the Byzantine or other contexts. Andrew Louth's most insightful introduction, which sets the papers into the larger context of historical theology while also relating them to each other, is especially commended to the reader.' Logos: A Journal of Eastern Christian Studies