The Norse earldom of Orkney and Shetland, with Caithness across the firth — the northern anchor of the Viking sea-roads for six centuries.
Pledged to Scotland in 1468-69 for a royal dowry and formally annexed in 1472.
The atlas holds 2 border frames for Earldom of Orkney — the shape you scrub through changes in 875 · 1397.
The North Atlantic earldoms in the Viking world.