A while ago, before the internet, I became interested in studying Saharan rock art, one of the most beautiful and extensive bodies of prehistoric art, but documentary references were hard to find. This is partly because most of the published literature on Saharan rock art is in French, Italian and German.
The Chinese sage Confucius (551-478 B.C.E.) greatly esteemed the founders of the Zhou Dynasty, who lived five hundred years before. This is reflected in several of his sayings, including, “How weak I have become. For a long time I have not dreamed about the Duke of Zhou.”