Despite the accepted fact that Newgrange is one of the most advanced Neolithic constructions designed and built to manage the rays of the sun, many writers persist with the 300 year old classification that Newgrange is merely a passage grave, or burial tomb. In Newgrange, temple of life, Chris O'Callaghan challenges that claim, proposing that this commonly coined 'passage grave' description seriously misrepresents what the leaders, astronomers, architects, engineers, artists, builders and hundreds of workers achieved on the Newgrange ridge over 5,000 years ago.