In the 1930's Rabbi Elchonon Wasserman, one of the greatest European Jewish Torah scholars and head of the Yeshiva of Baranowitz, Poland, published a series of essays entitled "Ikvesa D'meshicha" on the problems facing Jewry at that time.

On Friday, August 10, 2007, Jews commemorated the 28th anniversary of the passing of Grand Rabbi Yoel Teitelbaum (1887-1979), former rabbi of Satmar, Hungary and revered leader of tens of thousands of Jews in New York and worldwide.