During the Ottoman pressures on the territory of the Hungarian-Croatian kingdom and one of the most difficult epochs for the Croatian people, nobility were the ones who preserved „the rest of the remains of the former glorious Croatian kingdom”. One of these noble families was the counts Zrinski, who were from Peter II., Nicholas IV. Zrinski of Szigetvar and to his heirs who were defenders of the borders and the Croatian people from the Ottoman conquest, plundering and killing. From the time Zrinski obtain Zrin through replacement, they started their gradual acclimatization in Slavonia and later in Hungary. The Counts Zrinski had spread their influence through the kingdom in various ways, and so on to the life of Nikola IV, they became one of the most powerful aristocratic families in the kingdom and Nikola IV. Zrinski of Szigetvar himself one of most important persons in the kingdom. The marriage policy, their own ministry, and many other duties and carefully designed activities were the reasons for the survival and spread of the Counts of Zrinski during the Croatian-Turkish centennial war. Nikola IV. Zrinski of Szigetvar during his service and his heroic actions in the siege of the Szigetvar, had earned his place as one of the many Croatian heroes that have become part of Croatia's history and pride of the Croatian and Hungarian nations.