Ilarie Voronca is the pen-name of Eduard Marcus (December 31, 1903, Brăila — April 8, 1946, Paris), Romanian Jewish ethnic avantgarde poet and essayist.
In his early years, he was connected with Eugen Lovinescu's Sburătorul group, making his debut in 1922 in the Sburătorul literar (symbolist pieces inspired by the works of George Bacovia and Camil Baltazar). Voronca's poems of the period, gloomy and passive in tone, are in marked contrast to his later works. Only a year later, Voronca adopted a change in style, adhering to the modernist manifesto published in Contimporanul and contributing to literary magazines such as Punct and Integral. He and Stephan Roll issued a Constructivism-inspired magazine entitled 75 HP, of which only one number was ever printed.
In 1927, Voronca published a volume of poetry in Paris. Entitled Colomba after his wife Colomba Voronca, it featured two portraits drawn by Robert Delaunay. Colomba marked Voronca's new change in style: he had become a surrealist. Soon after that, his creations gained a regularity, and he was published frequently - especially after he settled in France (1933) and began writing in the French language. There followed: L'Apprenti fantôme ("The Apprentice Ghost"; 1938), Beauté de ce monde ("This World's Beauty"; 1940), Arbre ("Tree"; 1942). Several of his works were illustrated with drawings by Constantin Brancuşi, Marc Chagall, or Victor Brauner.
A French citizen in 1938, Voronca took part in the French Resistance. He visited Romania in January 1946, and was acclaimed for his writings and Anti-fascist activities. He never finished his Manuel du parfait bonheur ("Manual for Perfect Happiness"), committing suicide later in the same year. An edition of selected poems was published in France in 1956; it was followed ten years later by prints of never-published works. Saşa Pană oversaw a Romanian edition of many of Voronca's poems in 1972.