Archaeologists have uncovered 26 new sites in the Tara-Skryne valley in Co Meath where the proposed M3 motorway is to be routed.
Among the more significant finds along the 15-kilometre stretch between Dunshaughlin and Navan are three large enclosed settlement sites or medieval farmsteads, four prehistoric burial sites and one Bronze Age house.
A range of other archaeological features were also found including a medieval house and field system, two pit kilns and several prehistoric burnt mounds.
The foundations of five early modern houses including a post office and a cottage dating from the early 19th century were also uncovered.
A geophysical survey carried out in 2000 had identified nine sites of archaeological significance in the area, which excludes the Hill of Tara and its environs.
But archaeologists commissioned by Meath County Council at the behest of the National Roads Authority have now discovered 26 more, bringing the total to 35.
The project's chief archaeologist, Ms Mary Deevy, told ireland.com the discovery of these sites at this early stage would give experts plenty of time to examine and excavate them carefully.
However, the discoveries are likely to add weight to the argument that the motorway should not be built so close to such a significant site as the Hill of Tara.
A number of groups have already threatened legal action if the NRA proceeds with excavations in the Tara-Skryne valley for the proposed M3 motorway.
