Walter de Gruyter
 Walter de Gruyter GmbH (German: [ˈɡʁɔʏ̯tɐ] or [ˈxʁɔʏ̯tɐ]; brand name: De Gruyter) is a scholarly publishing house specializing in academic literature. The company has its roots in the bookstore of the Königlichen Realschule in Berlin which had been granted the royal privilege to print books by King Frederick II of Prussia in 1749. In 1801 the store was taken over by Georg Reimer.