The Basics:

Beaghmore, said to be constructed in the early Bronze age, is full of megalithic features. Stone rings, standing stones and cairns (piles of stones) dot its fields, eight and a half miles North West of Cookstown, Ireland. Although there are many sites containing stone rings in Ireland, Beaghmore is said to contain the greatest concentration.

Theories regarding to the original use of the site vary. Several archaeologists have studied the site for alignments between the stone features and celestial events. Some such alignments have been suggested; however, these alignments tend to be imprecise and are likely incidental. Other historians have argued that the site served as a gathering place for religious or social events.

Deeper research:

In 1980, a Scottish engineer and archaeologist named Alexander Thom surveyed the Stone Rings of Beaghmore, producing a map and analyzing the geometries. He also categorized the stones, labeling each as either below or above 18 inches.

Beaghmore boasts seven main stone rings and ten stone rows. Of the seven stone rings, six appear as pairs and one larger stone ring stands on its own. This larger stone is filled with small upright stones known as “the dragon’s teeth”. Dotted around the stone circle are numerous cairns, which can be seen in the diagram above as collections of small stones.

As can be seen in the diagram below, several of the stone rings have rows of stones that run tangent to them. These point roughly in the NE direction.

The Geometry:

As seen in research by Alexander Thom, the geometry of Beaghmore can be broken down into a series of circles, lines, and eggs