Buddha mandala is an art either made out of sand or a painting. It is used as a visual aid for concentration and healing purposes. It is used in meditation halls too.
In the painting, there are many smaller circles inside a big circle. In the radial lines of the circle, we can see tiny pictures of Buddha. Above all, the painting tries to reveal the Buddha in different forms.
Mandala is a circle which is a device for the Tantric meditation. It is a visual aid for concentration and introversive meditation leading to the attainment of insights and to activation of forces culminating in “Siddhi” supernatural forces. The Mandala is the graphic representation of this process. It is not only theoretical but practical also as an operational scheme involving a clear plan for practical realization of the process within oneself. It thus becomes an instrument (Yantra).