Royal Worcester is a name used by collectors. Worcester porcelains were made in Worcester, England, from about 1751. A mark designed by Robert Chamberlain, a decorator at the factory, which sometimes included the name Worcester, appeared on Worcester pieces as early as 1790. The firm went through many different periods and name changes. It became the Worcester Royal Porcelain Company, Ltd., in 1862. Today collectors call the porcelains made after 1862 "Royal Worcester." In 1976, the firm merged with W.T. Copeland to become Royal Worcester Spode. The company was bought by the Portmeirion Group in 2009. Some early products of the factory are listed under Worcester.