The Stoglavy Sobor (Russian: Стоглавый Собор) (translated variously as Hundred Chapter Synod, Council of a Hundred Chapters, etc.) was a church council (sobor) held in Moscow in 1551, with the participation of Tsar Ivan IV, Metropolitan Macarius, and representatives of the Boyar Duma. It convened in January and February 1551, with some final sessions as late as May of that year. The Stoglavy Sobor was called under the government’s initiative which aspired to support the church in struggle against anti-feudal heretical movements and simultaneously to subordinate its secular authority.