Gouache on paper painting by Leon Zack, 1892 to 1980, a Russian-born French abstract artist. The artwork represents an architectural composition, presumably a stage design for the Opera-Comique, ca. 1950s. Signed by the artist in the lower right. Titled N2 in the lower right. Corrugated fiberboard mat, golden frame. Collectible Mid Century Figurative Graphic Art.