Wheel of Time Mandala, Kalachakra Mandala

The Kalachakra Mandala is a Tibetan Buddhist mandala that depicts the wheel of time and the cycles of existence. It is a visual representation of the teachings of Buddhism.

What does the Kalachakra Mandala represent?
Time : The Kalachakra Mandala represents the cycle of time, or samsara, which is made up of many Buddha fields and the five elements. 
Balance : The mandala represents the balance between the physical and mental aspects of life, and the importance of making peace with oneself. 
Enlightenment : The mandala represents the practice of purification that can lead to the state of Buddhahood. 

What does the word Kalachakra mean? 
The word Kalachakra is a Sanskrit word that combines kala, meaning "time", and chakra, meaning "wheel"