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Latitude: 53.1677 / 53°10'3"N
Longitude: -4.1414 / 4°8'29"W
OS Eastings: 256949
OS Northings: 365534
OS Grid: SH569655
Mapcode National: GBR 5P.4GGL
Mapcode Global: WH54F.CM4Z
Entry Name: Castell Llanddeiniolen
Scheduled Date: 25 September 1987
Source: Cadw
Source ID: 3489
Cadw Legacy ID: CN197
Schedule Class: Defence
Category: Motte
Period: Medieval
County: Gwynedd
Community: Llanddeiniolen
Traditional County: Caernarfonshire