Wed. Sep 17th, 2025


Steven McKenzieBBC Scotland News

David Simon A visualisation showing the previously unknown castle at Finlaggan. It shows two small islands in a loch. The nearest one has thatched roof buildings and a conical-shaped tower. The furthest island has a stone keep and is connected to the other island by a bridge.David Simon

Archaeologists say Finlaggan was once the location of a castle in the 12th and 13th centuries

A “forgotten” castle discovered on a Hebridean isle could have been home to kings who once ruled large parts of western Scotland, say archaeologists.

They believe the fortress, which was built across two small islands in a loch at Finlaggan on Islay, belonged to royalty more than 700 years ago.

Their descendants included MacDonald clan chiefs who became known as the Lords of the Isles.

These lords turned Finlaggan into a power base from where they controlled the Hebrides, Argyll and parts of the north west Highlands.

Dr David Caldwell An exposed area of stone-built walls and a floor. There are red and white measuring poles laid out on the ground. Dr David Caldwell

Archaeologists uncovered remains of the castle at Finlaggan

Archaeologists have spent almost 30 years studying Finlaggan to gain a better understanding of its place in the kingdom of the Lords of the Isles, and the site’s earlier history.

Remains of a castle were uncovered and dated to the 12th and 13th centuries, before the lords rose to power.

The castle had a rectangular stone tower similar to a keep, a type of heavily fortified stronghold found in castles in Carlisle, Bamburgh and Lancaster in England.

The tower had living quarters, courtyards, kitchens, a great hall where feasting took place and a chapel with a burial ground.

A map showing part of the west of Scotland and the locations of Islay and Ayr.

Archaeologists said Anglo-French kings in Britain and Ireland were known for constructing rectangular towers, and they suggested Finlaggan’s was built as a sign of power and wealth.

The castle may have been demolished because it was structurally unsound or damaged in enemy attacks.

A palace was later built on the same site for the Lord of the Isles.

David Simon A visualisation providing an aerial view of the small islands at Finlaggan. There are clusters of thatched roof buildings on the islands. There boats on the loch's water and white birds in the sky.David Simon

An illustration showing later medieval life at Finlaggan

The Lords of the Isles behaved like kings and regarded themselves as equals of Scottish and English royalty.

They carried out raids in mainland Scotland and places they attacked included Urquhart Castle on the shores of Loch Ness.

In the new book, archaeologists said Finlaggan was the lords’ centre of power.

Open Virtual Worlds at University of St Andrews A drone image showing archaeological remains at Finlaggan. There are ruined walls and rectangular shapes beneath grass-covered ground on an area of land that sticks out into the loch. The loch's waters are a peaty brown.Open Virtual Worlds at University of St Andrews

The new book draws on almost 30 years of research of Finlaggan

The book has been published by the Society of Antiquaries of Scotland.

Author Dr David Caldwell led a team of specialists and volunteers in uncovering the new insights about Finlaggan.

He said: “The processing of all the data that was gathered has been a major part of my life since the 1990s and I hope I have not only provided an account of interest but also a basis for others to carry out more research in the future.”

Dr Helen Spencer, head of research at the Society of Antiquaries of Scotland, said the charity’s mission was to share knowledge of the past as widely as possible.



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