The Theravada Buddhism was officially introduced to sri lankan in 3rd century BC by thera Mahinda , the son of emperor Asoka, He was followed by his sister Sanghamitta by bringing the Bodhi Sapling. The sacred tooth relic was bought to the island in the fourth century AC. The community of monks developed into different chapters and multitudes of sacred edifices were built by the royalty, as consequence of which Sri Lankan Buddhism has evolved into highly developed ritualistic religion.