5 In a wonderful manner, the beginnings of the Catholic faith in your country were consecrated in the persons of Prince Geza and the leaders of the nation, especially by the efforts of the holy bishop Adalbert, a man famous for his apostolic labors and finally, his martyr's crown. Those beginnings, however, were the more remarkable in that, considering the times and the position of their territories, they lay dangerously open to the lamentable separation from the Roman Church which was breaking out among the Easterners. What his father had begun, Stephan, a most exemplary Christian prince, persisted in and completed. He is therefore rightly celebrated as the chief pillar and light of your nation; he not only instructed it in the attainment of eternal salvation, but he also increased its extent and renown.
Source: Insignes (Vatican.va)