The McMahon Stone

The McMahon Stone stands on Mullach Leachta, the Hill of Leck, three miles southwest of Monaghan town, and served as the principal inauguration stone of the McMahon kings of Oriel, a Gaelic kingdom encompassing modern Monaghan, Armagh, and surrounding territories. The McMahon dynasty ruled this kingdom from 1243 to 1590 CE, tracing their lineage to the legendary Three Collas—Colla Uais, Colla M...