Ireland · Partial ruin
Dún Dealgan Motte
Dún Dealgan Motte is a medieval motte and National Monument on a ridge immediately northwest of Dundalk. The site preserves an earthwork motte built in the Norman period atop an earlier Gaelic fort hill; a southeast bailey and an internal souterrain are recorded. The place is associated in tradition with Cú Chulainn and later had an 18th-century castellated folly built on the summit.
Its prime
1210
Today
Partial ruin
As it stood in 1210
The shape it held in its prime.
A broad, turf-covered motte about 68 m across at the base and roughly 10 m high sits on a ridge overlooking the Castletown River and the northern approach. In its Norman-phase prime (c.1210) the summit was occupied by a wooden tower set within a continuous timber palisade; a bailey lay to the southeast defined by low earthen banks. The mound rises from grassy slopes and is backed by lines of trees along the ridge.
Its story
The story of Dún Dealgan Motte.
An ancient Gaelic dún stood on this ridge by Dundalk long before the Normans: legend claims it as the birthplace of Cú Chulainn, who bases himself here in the Táin Bó Cúailgne, and the Annals of the Four Masters place a battle here in 500 AD. A Z-shaped souterrain, 17 m long, was dug into the hill in the Gaelic period.
After the Norman invasion a motte-and-bailey castle rose on the hill — an earth mound some 68 m across and 10 m high, its wooden tower commanding the Castletown River and the northern route from Ulster. It was a stronghold of Hugh de Lacy, 1st Earl of Ulster, in 1210, but he abandoned it when pursued northwards by King John.
Step inside
5 places to explore in 1210.
The record describes 5 distinct spots at Dún Dealgan Motte — including 1 interior: entrance to the z-shaped souterrain. Create your own photoreal reconstruction and walk through every one — more scenes means more photos, more angles and more rooms of the immersive experience.
Create History
Recreate Dún Dealgan Motte with AI to explore it.
The artist rebuilds it as it stood in 1210 — a photoreal walk that belongs to you alone. Pay with coins, no subscription needed.
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