Emily Guerry is a historian of medieval art, architecture, and devotion. Her research examines the creation and transformation of relic cults across the global medieval imagination, focusing especially on iconography and material culture. With a particular interest in Capetian and Plantagenet courtly collections, she also retraces the missions of royal ambassadors tasked with transferring, delivering, and collecting sacred relics and other precious items. This includes the patronage of King Louis IX of France and his numerous (failed) attempts at an alliance with the Mongols, as well as the evidence for and significance of the material culture of Franco-Mongolian diplomatic exchange.