PPG Industries, Inc. is an American supplier of paints, coatings, and specialty materials based in Pittsburgh, Pennsylvania. It operates in more than 70 countries globally. A member of the Fortune 500, PPG is the second largest coatings company in the world by revenue, behind Sherwin-Williams. It is headquartered in PPG Place, an office and retail complex in downtown Pittsburgh, and is known for its glass facade designed by Postmodern architect Philip Johnson. Wikipedia