A team from University College Dublin have unearth almost 40 previously unknown monuments close to Newgrange, including a "spectacular" monument that aligns with the Winter Solstice sunrise.
The findings likely range from the Neolithic period (4000 BC), through the Bronze Age (2500 BC), and the early Middle Ages.
The monument aligned with the Winter Solstice sunrise is believed to be around 200—300 years newer than the Stone Age passage tomb at Newgrange, dated around 3200 BC, and was discovered in a field just metres from the famous site.
Dr. Steve Davis and a team from the UCD School of Archaeology used a large-scale geophysical imaging system to reveal the new monuments as a part of a joint project with the Romano-Germanic Commission.
"These methods have in the last few years changed our understanding of the Brú na Bóinne landscape beyond all recognition," Dr. Davis said.
Their survey made use of satellite-based remote sensing, drones, airborne laser scanning and geophysics to survey Brú na Bóinne, an area in County Meath that contains some of the world's most important prehistoric landscapes.
These include the large Megalithic passage graves of Knowth, Newgrange and Dowth, as well as around 90 other monuments from the Neolithic period.
https://phys.org/news/2 ... wgrange.html