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 is one that signifies more than a
      geometric design for visualization.  The Kalacakra mandala is the mandala of the
      deity Kalacakra, and represents the history of time, and the cosmic rhythms of this
      reality.  The Kalacakra mandala has been performed in the United States by a
      multitude of monastics, and some kalacakra ceremonies where headed by His Holiness the
      Dalai Lama.