Urna

In Buddhist art and culture, the Urna (ūrṇā, ūrṇākeśa or ūrṇākośa (Pāli uṇṇa), and known as in Chinese) is a spiral or circular dot placed on the forehead of Buddhist images as an auspicious mark.

As set out in the Lakkhana Sutta or 'Discourse on Marks', the ūrṇā is the thirty-first physical characteristic of Buddha. It is generally thought to be a whorl of hair and be a mark or sign of the Buddha as a mahāpuruṣa or great being. The device is often seen on sculptures from the 2nd century CE.