Cup with unglazed rim, 11th-early 12th century, Northern Song dynasty. Porcelain with translucent pale blue (qingbai) glaze, H: 5.4 W: 9.5 D: 9.5 cm, China. Gift of Mrs. Maureen R. Jacoby in memory of Rolf Jacoby. F1991.75. Freer/Sackler © 2014 Smithsonian Institution