Ireland · Partial ruin
O'Brien's Castle
O'Brien's Castle (Furmina Castle) is an early 15th-century rectangular tower house on Inisheer, built by a branch of the O'Brien family. The donjon contains vaulted ground-floor storage chambers, a first-floor great hall and mural stairs up to a parapet with a corbelled bartizan. The structure stands on one of the island's highest points and today survives as a partial ruin.
Its prime
1400
Today
Partial ruin
As it stood in 1400
The shape it held in its prime.
A rectangular stone donjon/keep of grey limestone rubble with squared ashlar quoins at the corners, rising directly from a grassy island ridge. Tall, straight walls punctured by narrow slit windows and a small ground-level storage doorway, with a first-floor entrance originally reached by an external timber stair. A parapet and crenellated walk with a projecting bartizan (its corbel carved with a human face) crowns the tower in its complete state.
Step inside
8 places to explore in 1400.
The record describes 8 distinct spots at O'Brien's Castle — including 3 interiors: first-floor great hall, mural stairs within the wall, ground-floor vaulted chambers. 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
See O'Brien's Castle with the fires lit.
The artist rebuilds it as it stood in 1400 — a photoreal walk that belongs to you alone. Pay with coins, no subscription needed.
Recreate Castle to Explore →
