Southeast Asia was an early center of Buddhist art and architecture before 1200. Key sites included the great stupa at Sanchi from the 3rd century BCE, which was later enlarged. Buddhism arose in India in the 5th century BCE and was influenced by Hinduism and Jainism. Important Buddhist concepts include samsara, karma, nirvana, and the teachings of Siddhartha Gautama. Under King Ashoka in the 3rd century BCE, Buddhism spread across Asia and prominent sites associated with the Buddha's life, like Lumbini, Bodh Gaya, and Sarnath, became pilgrimage destinations.