- Leon Czolgosz, anarchist assassin of U.S. President William McKinley
- Ignacy Hryniewiecki, assassin of Tsar Alexander II of Russia
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- Eligiusz Niewiadomski, modernist painter, art critic, assassin of Polish President Gabriel Narutowicz
- Ted Kaczynski, Polish-American anti-technology terrorist notorious for mailing bombs to his victims
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