To be considered educated in China, you were expected to be able to practise the Four Arts. These were playing the qin (a complex stringed instrument like a zither), weiqi (the strategy game also known as go), writing fine Chinese calligraphy in the styles of the great masters (shu), and appreciating and critiquing classical Chinese painting (hua). This wine jar from Shanghai Museum shows a group of ladies engaged in these cultural pursuits. You can see it in the BP exhibition Ming: 50 years that changed China, opening on 18 Sep 2014.
Great Britain moved from using the Julian calendar to the Gregorian calendar on Wednesday 2 September 1752. By this time, the two calendars were out by 11 days, so the following day was Thursday 14 September! This caused issues for objects like this one – a medal featuring a perpetual almanac. It was calculated using the Julian calendar, and the dates therefore became obsolete. There is a myth that people rioted asking for their eleven days back, which was stirred up by a satirical painting by William Hogarth, of which he also made an engraving, which you can see in the collection.