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Dumbarton Rock

Also known as Alt Clut

Dumbarton Rock is a volcanic plug on the north bank of the Clyde in western Scotland, known in Brittonic as Alt Clut, 'rock of the Clyde'. It was the chief fortress of the British kings of Strathclyde from at least the 5th century until Viking forces from Dublin besieged and sacked it in 870, after which the kingdom's centre moved to Govan.

Dumbarton Rock
Image: CC BY-SA 3.0 · Wikimedia Commons

Mentioned in 2 state histories

DamnoniiKingdom of Strathclyde

See also

Cite this entry
APA
The Epoch Institute. (2026). Dumbarton Rock. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/dumbarton-rock
MLA
“Dumbarton Rock.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/dumbarton-rock. Accessed .
Chicago
The Epoch Institute. “Dumbarton Rock.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/dumbarton-rock.
Harvard
The Epoch Institute (2026) ‘Dumbarton Rock’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/dumbarton-rock (Accessed: ).

Last reviewed October 2026Random entry ↻