This interdisciplinary research project is exploring the performance of prayer, liturgy, and hymns among a variety of Eastern and Western Christian traditions from the end of Antiquity to the Middle Ages. Focusing on the history and environments of worship shifts the emphasis in the comparative study of Christianity beyond the history of doctrine.

The timeline extended from the Council of Chalcedon in 451 - when the great division between Eastern Christianities took place - to the eleventh century, just before the cultural upheaval brought about by the Crusades. The geographical framework includes Christianity's religious centers - Palestine, Constantipole, and Rome - and its periphery - East Syria and Medieval France. New models of piety, the ways in which people imagined their interaction with the divine, and the rise of asceticism in the late antique Mediterranean world brought forth new conceptions and patterns of worship. Novel religious performances played a vital role in shaping Christian identities in Byzantium and the Latin West as well as encoding specific poetics and theories of how religion should function. Bringing together historians of religion, art, architecture, and music, the project is focused on religious performance as a way to re-narrate the history of Christian religious culture in the East and West in its social and intellectual contexts.