Pillars of Ashoka Capital is at the Sarnath Museum. 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 centre of the flag of India. The lions probably originally supported a Dharma Chakra wheel with 24 spokes, such as is preserved in the 13th century replica erected at Wat Umong near Chiang Mai, Thailand by Thai king Mangrai. The pillar at Sanchi also has a similar but damaged four-lion capital. There are two pillars at Rampurva, one with a bull and the other with a
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.