The ditched enclosures are a relatively recent issue in Portuguese Archaeology and Portuguese Heritage. They came late, but they came in strength. But they came at a time where agricultural changes in the area where they have their major concentration are seriously threatening them.
So far, though, only in March 2016 a ditched enclosure was classified as Site of Public Interest. It was Santa Vitória, the first identified and excavated ditched enclosure in the eighties of the last century.
But this week, after 20 years of continued research coordinated by the private company Era Arqueologia, Perdigões set of ditched enclosures was classified as National Monument, the top category for Portuguese Heritage.
It was not just Perdigões that was recognized here. It was also shown that the evaluation of public service and research must focus on the quality of the service and of the research, and not on the institutional nature of who does it.