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The 1838 edition of the OS 6-inch map shows a circular earthwork on the grounds of what was Glasnevin House and now St Mary's Secondary school. Situated on a prominent ridge top overlooking the Tolka valley. There are no visible remains at ground level.
Compiled by: Geraldine Stout
Date of upload: 27 August 2011
This remains an important historical record, but the official description says the monument is no longer visible or has been destroyed.
The monument record does not grant public access. Check the route and ask the landowner before entering private land.