Kesariya is a small city in Bihar, India. It is famous for being the site of (possibly) the biggest stupa of India, built by King Ashoka. Kesariya used to be called Kesaputta during the time of the Buddha. It was a township of the Kosalans and the residence of the Kalamas. The Buddha once stayed there, on which occasion he preached the Kesaputtiya Suttas (a group of suttas preached to the Kalamas of Kesaputta - A.i.188), amongst which is the famous Kalama Sutta.