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Latitude: 52.9743 / 52°58'27"N
Longitude: -4.3383 / 4°20'17"W
OS Eastings: 243084
OS Northings: 344441
OS Grid: SH430444
Mapcode National: GBR 5F.JNM2
Mapcode Global: WH445.BHCP
Entry Name: Tyddyn Mawr, standing stone to SSW of
Scheduled Date: 25 February 2005
Source: Cadw
Source ID: 4165
Cadw Legacy ID: CN384
Schedule Class: Religious, Ritual and Funerary
Category: Standing stone
Period: Prehistoric
County: Gwynedd
Community: Llanystumdwy
Traditional County: Caernarfonshire