Many Buddha images, so called reclining Buddha’s, have been made of the parinirvana of the Buddha.
Although he had attained enlightenment, as a human Buddha had to die. According to tradition, this took place in Kushinagara in India when he was eighty years of age. The physical death of the Buddha is termed parinirvana, the great state beyond nirvana.
According to tradition, Buddha departed this life while lying on his right side and supporting his head with his right hand, a position known as the mahaparinirvanasana.