The Buddha was born in Lumbini (Rummin-dei), near Kapilavastu (Kapilbastu) on the northern edge of the Ganges River basin, an area on the periphery of the civilization of North India, in what is today southern Nepal. Scholars speculate that during the late Vedic period the peoples of the region were organized into tribal republics, ruled by a council of elders or an elected leader; the grand palaces described in the traditional accounts of the life of the Buddha are not evident among the archaeological remains. It is unclear to what extent these groups at the periphery of the social order of the Ganges basin were incorporated into the caste system, but the Buddha’s family is said to have belonged to the warrior (Kshatriya) caste. The central Ganges basin was organized into some 16 city-states, ruled by kings, often at war with each other. attained Enlightenment. From that time, Siddhartha Gautama became known as the Buddha, "The Enlightened One”.