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Monument location is shown with schedule boundary polygons where available, otherwise marked as a point on the map which approximates to the centre of the monument.
Latitude: 52.9689 / 52°58'8"N
Longitude: -3.8954 / 3°53'43"W
OS Eastings: 272809
OS Northings: 342965
OS Grid: SH728429
Mapcode National: GBR 60.JVMB
Mapcode Global: WH55J.4MBT
Entry Name: Bryn-y-Castell Hillfort
Scheduled Date: 19 November 1979
Source ID: 273
Cadw Legacy ID: ME104
Schedule Class: Defence
Traditional County: Merionethshire