Louis Marcoussis, formerly Ludwik Kazimierz Wladyslaw Markus or Ludwig Casimir Ladislas Markus, (1878 or 1883,[1] Łódź – October 22, 1941, Cusset) was a painter and engraver of Polish origin who lived in Paris for much of his life and became a French citizen.
After studying law briefly in Warsaw he went to the Kraków Academy of Fine Arts, where his teachers included Jan Stanislawski and Jozev Mehoffer. Moving to Paris in 1903, he spent a short time at the Académie Julian under Jules Lefebvre. The first time a painting of his was shown in a major exhibition was at the Salon d’Automne in 1905, and over the next quarter-century his work was shown in many other important exhibitions, in particular at the Salon des Indépendants and the Salon des Tuileries.