The J.W. Knapp Company Building is a historic five-story, 190,000-square-foot (18,000 m2) Streamline Moderne building in Lansing, Michigan, United States. Designed by Orlie Munson of the Bowd–Munson Company, which also designed several other Art Deco landmarks in Lansing, including the Ottawa Street Power Station, it was constructed by the Christman Company in 1937 through 1938. The curvilinear look of the streamlined structure comes from huge plates of concrete faced with enamel, called "Maul Macotta", a copyrighted product of the Maul Macotta Company and prismatic glass brick windows. Alternating horizontal bands of yellow macotta and glass block are interrupted by vertical blue macotta pylons, rising from the building's four principal entrances. The pylons are pierced by windows. The entrance portals, display window aprons, and decorative banding are dark blue macotta. Red, yellow and blue spandrels, incorporating the letter "K" as a design element, decorate the entrance portals.