Let us briefly recall the point of departure for the history of the relations between the Church and the Polish nation in the ninth and tenth centuries, that is, at the time when a strong monarchy had been formed between the Vistula and the Oder rivers, within the borders approximating to those we see today. These centuries were decisive not only for Poland, but also for other central and east European countries—for Bohemia, Hungary, Kiev, Ruthenia, and also for Scandinavia. In all these countries the emergence of the state structure went together with the official adoption of Christianity by the rulers and the social élites. The authorities also saw to it that at least the minimum requirements of the new religion were introduced and observed throughout the population. Around AD 1000 the borders of European Christianity had expanded to a fairly impressive size, and therefore this is a moment of special significance in the history of the European community. Only relatively small areas of heathendom remained unaffected, particularly the region of the Baltic coast—and it was in this region where the last stage of European Christianization took place, namely, the baptism of Lithuania in 1386–7, whose six-hundredth anniversary we celebrated recendy.