Even walls can evolve. A survey of the oldest section of the Great Wall of China not only bumps back its age by 300 years but shows waves of architectural innovations. The oldest section is in the Changqing District, Jinan, Shandong Province and is sometimes called the Great Wall of Qi.
Revisiting the Great Wall
The survey, conducted last year by the Shandong Provincial Institute of Cultural Relics and Archaeology, employed a host of tools to investigate the wall’s origins. They sampled soil from a variety of areas around the wall and looked for trace amounts of dead plants.
