Containers of tea have been found in tombs dating from the Han dynasty (206 BC- 220 AD). It was under the Tang dynasty (618 - 906 AD), that tea became firm;y established as the national drink of China. It became such a favorite that during the late eighth century a writer called Lu Yu wrote the first book entirely about tea, Ch'a Ching, or Tea Classic. It was shortly after this that tea was first introduced to Japan, by Japanese Buddhist monks who had traveled to China to study. Tea drinking has also become a vital part of Japanese culture. Next, tea makes it way to Europe.