Saint-Gobain S.A. is a French multinational business that was formed in 1665 in Paris and is based in La Défense and Courbevoie on the suburbs of Paris. It began as a mirror producer but has since expanded to include construction, high-performance, and other materials. Saint-Gobain is divided into three primary sectors (percentage based on 2014 Net Sales, excluding Verallia): Building Distribution (49%) is followed by Construction Products (27.5%) and Innovative Materials (23.5%). Saint-Gobain Glass, Saint-Gobain Performance Plastics, Weber, British Gypsum, Glassolutions, Gyproc, Artex, Isover, CTD, Jewson, Ecophon, Pasquill, and PAM are among the brands it distributes. In the last several years, Saint-Gobain has completed a number of purchases including British company BPB plc, the world's largest manufacturer of plasterboard, for US$6.7 billion in December 2005.