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In page Marta Hegemann:

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In 1919, Hegemann was involved with developing a Cologne Dada group and its offshoot Stupid with Anton and her friend Angelika Hoerle. She later moved away from Dadaism and became a key member of the Cologne Progressives, although she was less politically active than many members of this group.[1] By the 1920s, Hegemann had become one of the most respected avant-garde artists in Cologne and her work was exhibited widely. Her paintings featured surreal compositions executed in a style that combined elements of Dadaism, Constructivism, and New Objectivity.[1] With the rise of Nazism, her career began to decline. She and her family moved to Rome for three years (1933–36), and in 1937 she and Anton separated.