An unmovable keystone of the existence of old Hungary was the autonomy of countries. The most tarnished building of counties was the County Hall. The exhibition showing the history of the architecture of County Halls is the result of a several decade research work of Hatvani Sándor. The material includes detailed chronolgy, photos, ground-plans, maps, portraits of Lord Lieutenants along with the scale model of the Castle of Tata.