Sand mandalas are an ancient, sacred form of Tibetan Buddhist art. The word mandala itself is a Sanskrit word meaning "circle" and at its deeper levels a mandala represents the wholeness and harmony at the heart of the Tibetan Buddhist universe.
Mandala of Vajradhatu. Mandala (from Sanskrit, meaning 'circle') is a spiritual and ritual symbol in Hinduism and Buddhism representing the Universe. The basic form of most mandalas is a square with four gates containing a circle with a center point.