Abstract
The thirteenth century in the Czech lands is undoubtedly the most interesting period for the nobility. In the first half of the century an almost invariable group of noble families around the monarchs was established so that the impossibility of political upheaval led to the uprising of part of the nobility and the civil war between 1248-1249.
Having collected data on approx. 2300 noblemen from 568 charters, with the use of social network analysis we attempt to describe polarization within the nobility and explain which noblemen joined the uprising in the ranks of Přemysl Otakar II (Ottokar II.) and how their position in the social network influenced their chances to be appointed to high-ranking positions within the kingdom after the coronation of Přemysl Otakar II.