About Bi disc
璧 Inspired by ancient China, these circular shaped artefacts are named bi discs, or Pi, a representation of the celestial universe in the Liangzhu culture. The oldest bi discs excavated date from prehistoric times, at more than 7000 years old. As a plain flat rounded form, bi discs were used in ceremonies and ritual worship ; made of stone with circular holes in the centre, they were a symbolic representation of eternal life. They are believed to have been used as part of Chinese tradition for thousands of years, at least until the Han dynasty (220-206 BC), the golden age of ancient China. In traditional Chinese culture, it is recognised to bring happiness, wealth and protection. During prehistorical times bi discs were undecorated, but from later periods in Chinese history (Chang, Zhou and Han dynasties) they featured ornate carvings, patterns and numerous motifs. Over time, the symbolic nature of the bi disc has faded away, such that it is now considered more of a decorative object.