Bernie, that's exactly what I thought, 500 years before the Egyptians started to make their pyramids, the bloody Irish made a theatre that was lit up once a year by the sun, to celebrate the end of teh darkness. The structure was built out of rocks.
That sounds as though they had some time on their hands, plenty o meat and hides, the kids were doing well at school and the retirement fund was coming along nicely.
That was a full thousand years before Stonehenge was built, too. That accuracy of planning and design could exist 5000 (FIVE THOUSAND) years ago boggles this here mind.
Especially in Ireland. I can say this really slow, one more time, for the Irish.