The mandala (tib. Kyilokor) is a geometrical design
      used for the aid of visualization during meditations.  There are a wide variety of
      mandalas ranging from those that represent the history of time, to those that offer
      tantric designs for the aid of visualizations.  Having a circle as the main theme,
      the mandala incorporates many shapes and colors each with specific significance for the
      practitioner's advancement along the path towards nirvana.  This mandala depicts the
      unity that is the ultimate reality.