The fifth and fourth centuries 
B.C. were  a time of worldwide intellectual ferment. It was an age of great  thinkers, such as Socrates and Plato, Confucius and Laozi.   
In 
India, it was the 
Age of the Buddha, after whose passing a religion developed that eventually spread far beyond its homeland.
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| Buddhism along the Silk Road at the Met, New York City, Jan. 9, 2013 (Asterix611/flickr) | 
   He  then sat down in yogic meditation beneath a banyan tree [pipal or "sacred fig," the 
Ficus religiosa, the forebear of world's oldest historically documented tree] until he  achieved enlightenment. He was known henceforth as 
the Buddha, or the "Enlightened One."
   
He found the Middle Path, rejecting both hedonism and asceticism. Buddhism  proposes a life of good thoughts, good intentions, and straight living,  all with the ultimate aim of achieving nirvana, release from [all conditioned] existence. 
  
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| (Asterix611/flickr.com) | 
For most beings, nirvana lies in the distant future, because  Buddhism, like other 
dharmas [doctrines] of India, believes in a cycle of rebirth.
  
Beings are reborn many times, each time with the opportunity to  further perfect themselves or devolve. And it is their own karma -- the sum total of  deeds, beneficial and harmful -- that determines the circumstances of future births. 
  The Buddha spent the remaining 45 years of his life teaching a doctrine and discipline and making vast numbers of converts. When he entered final nirvana, released from all rebirth, his body was  cremated as was customary in India. 
The cremated relics of the Buddha were divided into several portions and  placed in relic caskets that were interred in large hemispherical  mounds known as 
stupas. Such monuments are centrally placed in Buddhist monastic complexes. They attract pilgrims from far and wide who  come to experience the teaching, the monastic order, and even some small portion of the remains of the Buddha. 
   
Stupas are  enclosed by a railing that provides a path for respectful circumambulation.  The sacred area is entered through gateways at the four cardinal points.
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