Clach nam Breatann
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The Clach nam Breatann (or Minvircc[1]) is a large stone which marked the boundary between Dál Riata, Alt Clut and the homeland of the Picts in what is now Scotland.[2]
The Stone still stands, on the slopes of Glen Falloch, between Crianlarich and Inverarnan. The base circumference is 180 feet (55 m) and height 12 feet (3.7 m).[1]
There is another boundary stone in Ben Donich, called Clach A' Bhreatunnaich.[3]