Mandala is a circle which is a device for the tantric meditation. It is a visual aid for concentration and introvertive meditation leading to the attainment of insights and to activation of forces culminating in "Siddhi" supernatural forces. The mandala is a graphic representation of this process. It is not only theoretical but practical also an operational scheme involving a clear plan for practical realization of the process within oneself. There are many types and varieties of mandala depending on the nature of central deity. The most classic pattern of mandalas are of the Dhyani Buddha. This pattern appears in the oldest tantrics. The mandala represents "place of purity" a magic sphere cleared of spiritual obstacles and unpurified. The square of the 'sacred palace' proper is enclosed in multiple circles of flame, vajra, eight cemetries (appears only in wrathful deities) lotus, then the inner squareto reach of the deity of the mandala. These thangks are so wonderfully painted that each and every detail of the thangkas can be clearly visible.