Buddhist thangka "Kalachakra Palace." Cotton fabric, silk, gold thread embroidery. Tibet, 20th century.This depicts the mandala of the deity Kalachakra, or more precisely, his palace, in the form of a complex diagram or plan.Kalachakra signifies the wheel of time. The very concept of "mandala" is essential for meditation, helping the meditator to realize the harmony between what is happening within and the processes outside. (Outer and Inner Kalachakra).