Eligiusz Niewiadomski, Polish painter and critic (d. 1923)

Eligiusz Niewiadomski (December 1, 1869 in Warsaw – January 31, 1923 in Warsaw) was a Polish modernist painter and art critic who sympathized with the right-wing National Democracy movement. In 1922 he assassinated Poland's first President, Gabriel Narutowicz, in his first week in office as president.