What is recorded here

Boyle-Somerville (1909) claimed the stone marked astronomical alignments for the Beltany circle, turning a lonely rock into a cosmic ruler. If true, the builders read the horizon like a clock, placing every stone against the light of rising or setting stars. The claim still lacks proof, but it reframes the circle from a random heap into a deliberate instrument of measurement.

Located to the SE of Beltany stone circle (DG070-026002-) (National Monument Number No. 463), which is situated on the summit of Beltany Hill, is an out-lying standing stone 2m high. Boyle-Somerville (1909) suggested that this outlier as well as other features of the adjacent horizon were employed by the circle builders to determine astronomical alignments. The above description was derived (p. 73, no. 329) from the 'Archaeological Survey of County Donegal. A description of the field antiquities of the County from the Mesolithic Period to the 17th century.' Compiled by: Brian Lacey with Eamon Cody, Claire Cotter, Judy Cuppage, Noel Dunne, Vincent Hurley, Celie O'Rahilly, Paul Walsh and Seán Ó Nualláin (Lifford: Donegal County Council, 1983). In certain instances the entries have been revised and updated.

Probably dates to the Neolithic or Bronze Age, given its proximity to the Beltany stone circle, which is associated with ritual or ceremonial activity. The stone may have had a symbolic or territorial function, or been part of a wider ritual landscape.

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