Karol Hiller (1891–1939) was a Polish artist whose innovative approach to modernism bridged multiple disciplines, making him a unique figure in 20th-century art. Born in Łódź, Hiller originally trained in chemistry and technology before turning to art, a shift that heavily influenced his methodical and experimental creative process. His work spanned painting, graphic art, and photomontage, reflecting a deep engagement with Constructivism, Surrealism, and the burgeoning modernist movements of his time. Hiller is best known for his "heliographic" technique, a pioneering method that combined elements of photography and graphic arts. Using chemically treated paper and sunlight exposure, Hiller created intricate, abstract compositions that were at once scientific and deeply expressive. This innovative process distinguished him as a modernist deeply interested in the intersection of technology and art, an interest that was particularly resonant during the interwar years, a period of rapid industrial and scientific advancement. In addition to his experimental techniques, Hiller’s work often carried a philosophical undertone, reflecting his engagement with existential themes and his reaction to the sociopolitical upheavals of his era. His compositions frequently explored notions of space, time, and human fragility within an increasingly mechanized world. His works are characterized by their precise geometry and abstract forms, which often suggest a tension between order and chaos. While some of his contemporaries gravitated towards utopian visions of the future, Hiller’s work offered a more introspective and often ambiguous perspective, one that emphasized the complexity and dualities of human existence. Tragically, Hiller’s career was cut short by the outbreak of World War II. Arrested by the Gestapo in 1939, he was executed in a forest near Łódź. His death marked the loss of a visionary artist whose experimental spirit and intellectual rigor left a profound impact on Polish modernism. Today, Hiller’s work is celebrated for its innovative techniques and philosophical depth, securing his place among the key figures of early 20th-century avant-garde art. His legacy continues to inspire contemporary artists who seek to push the boundaries of medium and meaning.