Eilean Donan

It is possible that an early Christian monastic cell was founded on the island in the 6th or 7th century, and that it was dedicated to Donnán of Eigg, an Irish saint who was martyred on Eigg in April 617. No remains of any Christian buildings survive, though fragments of vitrified stone (stone that has been subjected to very high temperatures) have been discovered, indicating that there was an Iron Age or early medieval fortification on the island.

In the earlier thirteenth century, during the reign of Alexander II (ruled 1214–1249), a large curtain-wall castle (wall of enceinte) was constructed; it enclosed much of the island. At this time, the area around the island was at the boundary of the Norse-Celtic Lordship of the Isles and the Earldom of Ross: Eilean Donan provided a strong defensive position against Norse expeditions.

The Rev. Farquhar Macrae, son of Christopher Macrae, was born at the castle in 1580. After attending Edinburgh University and taking holy orders, in 1618 he was appointed constable of the castle and minister of Kintail on the death of Murdoch Murchison. Colin Mackenzie of Kintail was created Earl of Seaforth in 1623. He lived mainly at Chanonry of Ross in Fortrose, but made regular visits to Eilean Donan where the constable was required to entertain him and his retinue of between 300 and 500 retainers, as well as the neighbouring lairds.