Period: Yuan dynasty (1271–1368)
Date: mid-14th century
Medium: Porcelain painted with cobalt blue under transparent glaze (Jingdezhen ware)
Dimensions: Diam. 18 in. (45.7 cm)
Credit Line: Purchase, Mrs. Richard E. Linburn Gift, 1987
Accession Number: 1987.10
Close examination of the cobalt blue used to paint this dish shows areas of darker blue. Known as “heaped and piled,” this effect is a result of imperfect control of the pigment during firing. This effect disappeared in the early fifteenth century, when potters further mastered the use of this pigment.