Jar and cover, China, 1690. Porcelain painted in underglaze blue, 72.4 cm. RCIN 1108. Royal Collection © Her Majesty Queen Elizabeth II

A large potiche, the low domed cover with an infitting flange and knob finial. Painted in greyish blue is a formalised lotus scroll with a border of lotus petals below, and borders of key-fret and pointed petals on the shoulder and neck; the cover decorated to match.