Roméo Dumoulin was born in Tournai on March 18, 1883, the son of Léopold Dumoulin, a journeyman printer, and Élise Bocquet. From a young age, he turned to the arts, becoming an apprentice at the Lithographie Saint-Augustin and taking courses in chromolithography at the Saint-Luc school. At the same time, he studied music theory and the violin at the Tournai municipal academy, winning first prize for violin in 1905.
Upon his father's death, he moved to Cambrai to continue his artistic training at the Academy of Fine Arts. In 1909, he settled permanently in Brussels, in the Stockel district, where he worked in commercial and artistic printing, creating advertisements, covers, and posters for clients such as the Belgian National Railways Company and Bottresses liqueur.
At the same time, Dumoulin developed a personal work that was exhibited for the first time in 1918 at the Salle Acolian in Brussels, where it met with great success. He then participated in the Salon des Artistes Français and exhibited in various galleries in Paris, Antwerp, Nice, Buenos Aires and Algiers.
Roméo Dumoulin leaves a significant legacy in the field of graphic art and painting, testifying to a rich and varied career combining artistic creation and advertising design, and leaving a lasting mark on the Belgian and international art scene.