From the times of the Vedas (from circa 1500-1000 BC), people following monastic ways of life have existed in the Indian subcontinent. In what is now called Hinduism, monks have existed for a long time, and with them, their respective monasteries, called mathas. Important among them are the chatur-amnaya mathas established by Adi Shankara which formed the nodal centres of under whose guidance the ancient Order of Advaitin monks were re-organised under ten names of the Dashanami Sampradaya.