history of the Great Wall of China
... that while the most visible structures date from the Ming dynasty (1368–1644), the history of the Great Wall of China reaches back to the 7th century BC ?
... that while the most visible structures date from the <a href="./Ming_dynasty" id="mwig" rel="mw:WikiLink" title="Ming dynasty">Ming dynasty</a> (1368–1644), the <b id="mwiw"><a href="./History_of_the_Great_Wall_of_China" id="mwjA" rel="mw:WikiLink" title="History of the Great Wall of China">history of the Great Wall of China</a></b> reaches back to the 7th century BC <i id="mwjQ">(<a href="./Han_dynasty" id="mwjg" rel="mw:WikiLink" title="Han dynasty">Han dynasty</a> watchtower pictured)</i>?