The conch is always portrayed with a spiral to the right, which is considered extremely rare in nature.
This represents the rare gift of the Buddha’s teachings to us. It represents the victory of the Buddhist teachings over ignorance, hatred, anger, delusion, and craving.
Many monasteries and retreat centers are decorated with some form of victory banner, and secular buildings in Tibet may contain a victory banner.
The origin is not known exactly, but it is believed to come from Indian traditions pre-dating the Buddha’s life.
Some scholars believe it comes from a belief that these are the eight items the brahmin offered to the Buddha after his death.