The Edah HaChareidis was founded by Rabbi Yosef Chaim Sonnenfeld and Rabbi Yitzchok Yerucham Diskin (son of Rabbi Yehoshua Leib Diskin) in 1921, prior to the establishment of the Chief Rabbinate by the Zionist movement under British auspices, which saw Rabbi Sonnenfeld named as the first Av Beis Din, a position he held until his death in 1932. His tenure saw the Ottoman Empire's control over the Land of Israel vanish, to be replaced with the British control of the region under the British Mandate of Palestine after World War I.