Bolesław Bogdan Piasecki (alias Leon Całka, Sablewski; born February 181915 in Łódź, died January 11979 in Warsaw) was a Polish politician and writer.In interwar Poland he was one of the more prominent nationalist politicians, playing an important role in the leadership of Obóz Narodowo-Radykalny. In 1934 he was interned in Bereza Kartuska. After his release, he became the leader of the illegal, extreme right faction ONR-Falanga. This organisation advocated "Catholic totalitarianism" and is considered by many to have been a fascist movement.
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