One of the world's largest materials groups, Compagnie de Saint-Gobain is in a "glass" by itself. The mega-group develops, manufactures, and distributes a wide variety of products for construction, transportation, industrial, food storage, and solar energy use. Saint-Gobain operates in four primary sectors: Building Distribution, Construction Products (insulation, roofing, and other products), Innovative Materials (Flat Glass and High-Performance Materials such as polymers and glass fabrics), and Packaging (glass bottles). It owns notable brands such as Norton, Rencol, Winter, and CertainTeed. Saint-Gobain dates to the 1660s, when it made mirrors for the Palace of Versailles.