What better observatory of a society's cultural options than its school ? It's the school that concentrates, schematizes and adapts them, while helping to affirm and transmit them. This was all the more true during the late Antiquity (4th-8th centuries), when the schooling of culture led to choices being made according to school imperatives, while at the same time having a profound influence on literary creation through teaching methods and curricula. The school may well be the best placed to shed light on the Christianization of written culture and the way in which secular culture reacted to it. This is what we'll discover through the papyri of Egypt, which plunge us into the day-to-day world of lectures at all levels and in very different environments. We'll see whether teachers' practices reflected the thinking of intellectuals (philosophers, theologians, rhetors) who were making school a key factor in the development of a Christian culture.