. . . . "55819" . . "Refers to the glaze of white porcelain that is decorated with blue under the glaze. Underglaze blue had been used in the Middle East from the 9th century; it was introduced to China in the Yuan dynasty (1279-1368). Particularly notable are the blue-and-white wares produced in China during the Ming (1368-1644) and Qing (1644-1911) dynasties. Underglaze blue was introduced to Europe from China in the 18th century."@en .