Guillaume Seignac (1870–1924) was a French academic painter, born in Rennes and dying in Paris. He studied at the École des Beaux-Arts de Paris and the Académie Julian from 1889 to 1895, where he trained under Gabriel Ferrier and Tony Robert-Fleury. William A. Bouguereau significantly influenced his work. Seignac regularly exhibited at the Salon de Paris from 1897, receiving an honorary mention in 1900 and a third-class medal in 1903.
Seignac cultivated classical academicism throughout his career, focusing almost exclusively on allegorical and mythological subjects, often depicting idealized nude women. His treatment of drapery showed influence from the sculptor Phidias and Michelangelo's frescoes. Later, he also painted patriotic themes, such as works commenting on World War I events, including Belgium - 1914 and Alsace and France.
