Joseph Lacasse (Belgian 1894–1975) is considered one of the most unique abstract painters of the École de Paris. Lacasse executed his first abstract drawing at the age of 12, and by 1910, was painting abstract oils. In 1912, Lacasse entered the École des Beaux-Arts of Tournai, where he explored a number of different styles, including his own brand of Cubism that he called "constructive."

In 1921, Lacasse traveled to Italy, where he produced the Motherhood series, which focused on religious works and workers, and was done in a realistic style. In 1925, he relocated to Paris, where his association with Robert Delaunay greatly influenced his use of color. During the 1930s, Lacasse moved toward Tachism.

Lacasse’s work is characterized by intense, continuous color. He died in Paris at the age of 81.