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cat: W/7   S1, Llananno, Mid Wales

W/7.1.1   S1 Llananno is a 1 ton stone block sitting at the centre of a ruined stone circle to the east of Llananno parish. From this stone several alignments radiate to distant tumuli around the Mid Wales horizons whichhave been found to indicate rising or setting points of the Sun or Moon at declinations required for the maintenance of two high precision positional astronomy procedures carried out in prehistoric Mid Wales.

W/7.1.2  This circle is thought to be the highest in Britain at nearly 1600 feet, (488). It has a broad, open aspect overlooking much of Mid Wales. Some 20 tumuli are visible from this place capping the tops of the highest hills on far horizons. The map below shows all the Megalithic Calendar and Lunar Standstill alignments from the stone at Llananno to distant markers on the horizon which have, to date, been identified by photography. W/7.1.3  Click on a thumbnail or use the links below to view details of each alignment.

S1 to YGlog, Dolfor. S1 to Two Tumps, Kerry Hill. S1 to Gorslydan, Llanbister. S1 to Rhoscrug1, Llanbister. S1 to Drygarn Fawr, Rhayadar.

W/7.1.4  Identical in function and style to several other megalithic multiple usage stone observatories in Scotland and Wales, this site supports seven high resolution alignments to tumuli or cairns:

Three calendar alignments indicate the first days of six intervals or 'months' in the 16 interval Megalithic Calendar. S1 also supports two paired indicators for theperturbation maxima at both north and south extremes of the Moon in it's orbit. These extreme positions are termed the lunar standstills and the Moon only reaches them once every 18.6 years.

Although there are many other tumuli adorning these horizons numeric results of high resolution probability surveys mean that it is unlikely this stone is situated by chance. This survey is supported by computer analysed photographic data.

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