Ashoka Wheel of Dharma). The wheel has 24 spokes which represent the 12 Laws of Dependent Origination and the 12 Laws of Dependent Termination. The Ashoka Chakra has been widely inscribed on many relics of the Mauryan Emperor, most prominent among which is the Lion Capital of Sarnath and The Ashoka Pillar. The most visible use of the Ashoka Chakra today is at the centre of the National flag of the Republic of India (adopted on 22 July 1947), where it is rendered in a Navy-blue color on a White background, by replacing the symbol of Charkha (Spinning wheel) of the
Ashoka three colours, Saffron, White and Green with the Ashoka Chakra was selected. Ashoka is often credited with the beginning of stone architecture in India, possibly following the introduction of stone-building techniques by the Greeks after Alexander the Great. Before Ashoka's time, buildings were probably built in non-permanent material, such as wood, bamboo or thatch. Ashoka may have rebuilt his palace in Pataliputra by replacing wooden material by stone, and may also have used the help of foreign craftmen. Ashoka also innovated by using the permanent qualities of stone for his written edicts, as well as his pillars with Buddhist symbolism.