 In Romania, on the other hand, upon extinction of the male line descended from Carol I of Romania, the constitution stipulated that the male line of his brother, Leopold, Prince of Hohenzollern, would inherit the throne and, failing other male line issue of that family, a prince of a "Western European" dynasty was to be chosen by the Romanian king and parliament.By contrast, older European monarchies tended to rely upon succession criteria that only called to the throne descendants of past monarchs according to fixed rules rooted in one or another pattern of laws or traditions.In hereditary succession, the heir is automatically determined by pre-defined rules and principles.