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Crannog is a Early Christian artificial island settlement located in County Fermanagh, Northern Ireland. Built upon bedrock of the Tyrone Group—a complex geology of Visean-age limestone, mudstone and sandstone interspersed with siltstone, chert and coal—the crannog represents a distinctive form of habitation practised across early medieval Ireland. These artificial islands, constructed by building up successive layers of timber, stone and organic material, were favoured dwelling places for families of status, offering both practical advantages in waterlogged terrain and defensible positions within lakes or wetlands.
Early Christian crannogs typically date to the period between the 5th and 12th centuries, functioning as high-status residences, sometimes monastic retreats, or administrative centres. The settlement pattern across Fermanagh's lakes reflects the region's prosperity during this era, with numerous such structures now submerged or partially visible in the landscape. This crannog at grid reference H3240043020 survives as an archaeological resource that contributes to understanding settlement patterns, construction techniques and the material culture of early medieval Ulster.
The monument is protected by the Historic Environment Division of the Department for Communities under reference 10285, recognising its significance as a non-designated archaeological site of regional importance within the Fermanagh landscape.
Crannog is a scheduled monument protected by Department for Communities NI under reference 10285. View the official record →
Crannog is a Early Christian artificial island settlement located in County Fermanagh, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 10285.
Crannog dates from the e.christ. period, and is classified as a crannog. It is one of over 32,000 scheduled monuments protected across the UK.
Crannog is a Scheduled Ancient Monument, legally protected by DfC Northern Ireland (NISMR) — the body responsible for designating and safeguarding heritage sites in Ni. The official designation reference is 10285.
Several scheduled monuments lie within 10 km, including Two burnt mounds/ cooking places (fulachta fiadh) (6.7 km), Platform rath (6.7 km), Lisnagole. platform rath (7 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Crannog's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Crannog stands on Tyrone Group, bedrock that formed in the Visean. The rock here is limestone, mudstone, sandstone and siltstone, with subordinate chert, coal and conglomerate.