The Department of the Environment has received the recommendations of the Director of National Museum relating to the significance of the newly discovered archaeological site near the Hill of Tara in Co Meath.
The substantial ancient enclosure is thought to date back to the Iron Age and is likely to have been used for ceremonial purposes.
Environment Minister Dick Roche has already ordered a stop to the construction work on the M3 motorway in the vicinity of the find, pending the completion of the National Museum report.
A department spokesman said its archaeologists will examine the report, and the Minister will issue directions to the National Roads Authority as soon as possible.
