Newgrange /The Boyne Valley - Dublin, Ireland.

Newgrange was built over 5,000 years ago in the Boyne Valley in Leinster, Ireland. 
It was constructed in 3,200 BC meaning it is older then Stonehenge in England and The Great Pyramid of Giza in Egypt. It is most well known for it's astrological and spiritual importance, however it is also a great place of evidence of ancient Celtic art.

Consisting mostly of spirals and abstract shapes it is mostly impossible for us today to know exactly what the Celts were portraying, though we can theorise.
Many think they hold an astrological meaning, the movement of the sun and the stars, or the changing of the seasons. Others think they were maps or mediation devices. 





Sources : http://www.worldheritageireland.ie/bru-na-boinne/built-heritage/art/
               http://www.newgrange.com/