Ashoka Stambh is a representation of 4 lion heads and chakras. This Lion Capital of Ashoka from Sarnath has been adopted as the National Emblem of India and the wheel “Ashoka Chakra” from its base was placed onto the center of the flag of India. The Pillars of Ashoka are among the earliest known stone sculptural remains from India. Only another pillar fragment, the Pataliputra capital, is possibly from a slightly earlier date. It is thought that before the 3rd century BC, wood rather than stone was used as the main material for India architectural constructions, and that stone may have been adopted following interaction with the Persians and the Greeks.