Taijitu seen in Tripilja culture in Ukraine, displayed in the Ukraine pavilion at the Expo 2010 in Shanghai, China. Also, the interlocking design is found in artifacts of the European Iron Age. While this design appears to become a standard ornamental motif in Iron-Age Celtic culture by the 3rd century BC, found on a wide variety of artifacts, it is not clear what symbolic value was attached to it. Unlike the Chinese symbol, the Celtic yin-yang lack the element of mutual penetration, and the two halves are not always portrayed in different colors. Comparable designs are also found in Etruscan art.
Popular belief lacks a formal canon. Rituals take place before home altars or at temples, which have no fixed congregations. Adherents vary considerably in belief and practice. Generally, folk religionists are fatalistic yet believe that one's luck can be affected by pleasing ancestors or gods, by locating graves and buildings in places where vital natural forces are located (geomancy), and by balancing opposing forces (yin, yang) within one's body. In Korea, Buddhism, Confucianism, and Taoism have influenced the elite, while a folk religion has existed among the common people that resembles Chinese Folk Religion. However, unlike the Chinese case, most Korean spirit