All times in UTC ·
Dashed edge = started before, or continues beyond, this day
Events on Saturday 31 December 1644 1
700 BC – 1644Great Wall of ChinaChina — New WonderA series of fortifications built across northern China's historical borders over more than two millennia, from the 7th century BC through the Ming Dynasty (1368-1644). The most well-known sections were built by the Ming Dynasty and stretch over 5,500 miles. Contrary to popular myth, it is not visible from space with the naked eye. An estimated 400,000 workers died during its construction.