Земский собор
Despite calamities triggered by the Great Fire of 1547, the early part of Ivan's reign was one of peaceful reforms and modernization. Ivan revised the law code, creating the Sudebnik of 1550, founded a standing army (the streltsy), established the Zemsky Sobor (the first Russian parliament of feudal estates) and the council of the nobles (known as the Chosen Council) and confirmed the position of the Church with the Council of the Hundred Chapters ("Stoglavy Synod"), which unified the rituals and ecclesiastical regulations of the whole country. He introduced local self-government to rural regions, mainly in northeastern Russia, populated by the state peasantry.