mega-what / prehistoric horizon calendars / Ireland, Kilkenny

Knockroe Passage Tomb: 360° N centred

North centred panoramic view with luni-solar trajectories c.3000BCE from Knockroe Passage Tomb, Kilkenny, Ireland. The green line approximates hidden horizon. North is obscured but seemingly at a break on the left slope of the local high point. South is at a break in the left slope of the highest distant hill.
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© Michael Wilson.