Moated site, Carrownalassan, Co. Roscommon

Moated site, Carrownalassan, Co. Roscommon

Sitting on a gentle south-facing slope in Carrownalassan, County Roscommon, this medieval moated site offers a fascinating glimpse into Ireland's defensive architecture.

Moated site, Carrownalassan, Co. Roscommon

The main feature is a square, grass-covered platform measuring approximately 39 metres east to west and 38.3 metres north to south. What makes this site particularly interesting is how it’s defined: a flat-bottomed moat runs along the northern and eastern sides, whilst scarps mark the southern and western boundaries. The northern moat is the more substantial of the two, with a top width of 7.7 metres narrowing to 3 metres at its base, and depths of 0.65 metres on the interior side and 0.55 metres on the exterior.

The eastern moat is even wider at the top, spanning 9.2 metres, though it’s somewhat shallower with interior and exterior depths of 0.5 metres and 0.3 metres respectively. The southern and western sides are protected by more modest earthen scarps; the southern scarp stands at just 0.15 metres high, whilst the western one reaches 0.6 metres. Attached to the eastern side, outside the moat, lies a rectangular grass-covered annexe measuring roughly 31 metres north to south and 29 metres east to west, defined by scarps ranging from 0.25 to 0.45 metres in height.



This type of moated site typically dates from the Anglo-Norman period, when such defensive earthworks were common throughout Ireland. The presence of an annexe suggests this wasn’t just a simple defensive structure but possibly served as a manorial centre with additional buildings or enclosures for livestock and storage. About 40 metres to the southwest stands another rath, indicating this area has been strategically important for centuries, with different cultures leaving their mark on the landscape through successive periods of occupation and fortification.

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Carrownalassan, Co. Roscommon
53.72116105, -8.19528404
53.72116105,-8.19528404
Carrownalassan 
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