Buddhism is one of the great oriental religions. It was called the Buddha, or 'Enlightened One'. He left his palace and his wife and child because he wanted to think about the problem of the man suffering. After six year of studying, he sat down under a tree (the Bo-tree), and finally he understood the reason for people's unhappiness. According to Buddha, we are unhappy because we are attached to people and things in a world where noting is permanent. We can find peace of mind by following the right path, and through meditation. Buddha is not a god;he is a guide to truth and self-knowledge. Buddhism was introduced into sri Lanka over 2,200 years ago by the son of an Indian Emperor, and beautiful Buddhism temples were built all over the island. Today,over two-thirds of the population of sri Lanka are Buddhists.