The subject of this research is the Royal Council as the main body based on estate representation in the Czech lands during the reign of the Jagiellonian dynasty (1471-1526). The formation of the Royal Council took place during the 15th-16th century. It became the main organ of state power of the Czech Kingdom in 1471-1526. It included the highest burgrave, land judges, the highest chancellor, the highest chamberlain, a regional clerk, a hofmister, two burgraves of Karlstein and a burgrave of Hradeskij region. The King made the final decision on the appointments to the post of mintzmister. Most posts were held by lords and knights. Royal cities were ruled by the local law. Thus, the main feature of the Royal Council was the limitation of the Royal power and the great importance of the Royal Congresses. The Royal Council played the main part in Czech society.