Newgrange, constructed around 3,200 BC, is the best-known monument of Brú na Bóinne. It predates the ancient pyramids of Giza by 400 years and Stonehenge in England by 1000 years. The passage tomb is surrounded by 97 kerb stones. Inside the large mound there is a long passage leading into a chamber which branches off three ways. The cremated remains of the dead were laid on large stone basins inside the chamber which usually were accompanied by grave goods. At dawn on the winter solstice, the shortest day of the year (December 21st), a shaft of sunlight enters the chamber of Newgrange through a specially designed opening over the doorway which illuminates the chamber. On December 21st 1967, Prof M. J. O’Kelly was the first person in modern times to see this now world-famous event.