The tradition of depicting humans who have become immortals is an ancient practice in Chinese art, and when religious Taoism gained popularity, it quickly picked up this tradition with its own immortals.[citation needed] While cults dedicated to various Taoist immortals date back to the Han dynasty, the popular and well-known Eight Immortals first appeared in the Jin dynasty. The art of the Jin tombs of the 12th and 13th centuries depicts a group of eight Taoist immortals in wall murals and sculptures. They officially became known as the Eight Immortals in the writings and works of art of the Taoist group known as the Complete Realization (Quanshen).