The first decades of the christanitas, counted from the moment of the ruler's baptism and thus his sovereignty, were focused, among other things, on expanding and consolidating his position.The most important factors they used were, on the one hand, the acquisition of the crown and, on the other, the establishment of an ecclesiastical organisation based on the archbishopric.
The establishment of the metropolis was a long and multi-stage process. One of the most important decisions was the choice of the archbishop's and the bishop's seats. In the two kingdoms of the Younger Europe - Poland and Hungary - the rulers of both were baptised within a relatively short period of time and metropolises were established in their kingdoms by papal bull. However, each example is characterised by different features from the prerogatives granted to them, to the choice of seats for the various offices, to the choice of their architectural forms - cathedrals.
