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.
Dating back to 200 to 700 AD, Kesariya Stupa consists of five huge terraces, each enshrining life size images of Lord Buddha. A giant manadala can be seen at the top. Further, the excavations revealed the walls of a small temple (10 ft) and a colossal figure of Buddha.