Orthodox Christianity does not consider itself to be a confession. Can it nevertheless be the subject of research on interconfessionality? This volume assembles contributions from an interdisciplinary symposium of the DFG Research Training Group 2008 "Interconfessionality in the Early Modern Period". They show that the questions and methods of interconfessionality research can be fruitfully applied to Orthodox Christianity. The experts who contributed to this book make interconfessionality visible in different contexts: in a church union on Rhodes, in the work of influential Orthodox clergymen such as Maximus the Greek and Evgenios Voulgaris, and finally also in the luggage of Orthodox alms-collectors who travelled through the Holy Roman Empire.