Земский собор
In development of the Third Rome ideas, the Grand Duke Ivan IV (the "Terrible") was officially crowned first "Tsar" of Russia in 1547. The "Tsar" promulgated a new code of laws (Sudebnik of 1550), established the first Russian feudal representative body (Zemsky Sobor), curbed the influence of the clergy, and introduced local self-management in rural regions.