The first Peking Glass factory ( Imperial Workshop ) was built in the Forbidden City within the Palace walls in 1696. It was overseen by a German Priest, who brought many Western techniques of Glass and Enamel work to the Chinese. The first "Peking Glass" items produced were single colored glass that was either carved or faceted. Overlay glass was developed later, which involved dipping a glass item into a vat of molten glass of a contrasting color. After cooling, the second color was carved away to reveal the color underneath. As this technique developed more colors and multiple layers were used. Peking Overlay Glass items are still being produced today. The Imperial Workshop was staffed with the best Craftsmen from all parts of China.