Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Brú na Bóinne - Archaeological Ensemble of the Bend of the Boyne' has mentioned 'Iron Age' in the following places:
Occurrence Sentence Text Source
For the Iron Age there is only evidence of sporadic activity, such as burials near Knowth and at Rosnaree.
Surrounded by about forty satellite passage graves, they constitute a funerary landscape recognised as having great ritual significance, subsequently attracting later monuments of the Iron Age, early Christian and medieval periods.