Dish with moulded characters 'tai xi'. Yuan dynasty, 1330-1340, shufu ware. Jingdezhen kilns, south China. Bluish (qingbai) glaze porcelain with moulded decoration under a white glaze. Diameter: 17.8 cm. Museum no. C.49-1965. J.G. Maxwell Brownjohn bequest [2007]. Victoria & Albert Museum, London © V&A Images

'Tai xi' refers to the Office of Imperial Ancestor Worship. This bowl would have been used in ancestral worship ceremonies performed by Mongol emperors.