More complex form seen on ca. 400 year old Chinese lacquerware dish.
The endless knot or eternal knot (Sanskrit: Shrivatsa; Tibetan Dpal be'u) is a symbolic knot and one of the Eight Auspicious Symbols. It is an important cultural marker in places significantly influenced by Tibetan Buddhism such as Tibet, Mongolia, Tuva, Kalmykia, and Buryatia. It is also sometimes found in Chinese art and used in Chinese knots.
The endless knot has been described as "an ancient symbol representing the interweaving of the Spiritual path, the flowing of Time and Movement within That Which is Eternal. All existence, it says, is bound by time and change, yet ultimately rests serenely within the Divine and the Eternal." Various interpretations of the symbol are:
Endless knots in other cultures 
Endless knots come as mystic/mythological symbols have developed independently in various cultures. A well-known example is the various Celtic knots.
The interlaced form of the unicursal hexagram of occultism is topologically equivalent to the Buddhist endless knot.
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