This volume contains a selection of papers read at an international colloquium on the way Eastern and Oriental Christianity has accommodated itself to a Diaspora situation. The colloquium was held at the KU Leuven in December 2016. Contributors have focused on liturgical issues (B. Groen, D. Galadza), ecclesiological and juridical questions (A. Kaptijn, V. Pnevmatikakis), the way the Orthodox churches are trying to adapt to these and other challenges of modern West-European and North American society as this was addressed in the recent Council of Crete (P. Kalaitzidis, P. Vlaicu), and the attitude of Middle Eastern Diaspora Christians towards Islam (A. Schmoller). In an epilogue, one also gets an inside view on a recent initiative to establish a theological seminar for Syriac speaking Christians (A. Shemunkasho).