Jean Lempire received his PhD from the University of Louvain, Belgium (2010) and has research interests in history of Greek astronomy, Byzantine astronomical manuscripts and Easter date literature. His research aims to edit Greek astronomical texts from the Alexandrian (5th-6th c.) and the Byzantine (7th-15th c.) period, and to analyze the milieus in which Byzantine astronomical manuscripts circulated. He has published an edition – together with translation and commentary – of the first astronomical treatise written in Constantinople (7th c.). Jean Lempire is also Lecturer in History of Science of Antiquity at the University of Louvain. At CHS, he plans to prepare an edition of Isaac Argyrus’ astronomical treatises (14th c.).