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Fermanagh Castle is a seventeenth-century fortification built upon limestone and mudstone bedrock of the Tyrone Group, which underlies much of this region of County Fermanagh. The castle represents a transitional period in Irish military architecture, when traditional medieval strongholds gave way to more modern defensive structures designed to withstand artillery. Its location on the Visean-age geology typical of Fermanagh reflects the strategic positioning of such structures within the landscape, often placed where water sources and defensible ground coincided naturally.
The castle's construction reflects the post-medieval period's shift towards trace italienne principles of fortification, with stronger walls and angular bastions replacing the high curtain walls of earlier times. Built across rock comprising subordinate bands of sandstone and siltstone alongside the predominant limestone, the structure would have utilised stone quarried locally where possible, a common practice that kept costs manageable and reduced transportation over difficult terrain.
This fortification is protected as a scheduled monument by the Historic Environment Division, Northern Ireland, under reference 11322, recognising its significance as evidence of seventeenth-century colonial settlement and military strategy in Ulster. The castle remains an important testimony to the period's architectural innovation and the strategic reorganisation of Fermanagh during a transformative era in Irish history.
C17th castle is a scheduled monument protected by Department for Communities NI under reference 11322. View the official record →
Fermanagh Castle is a seventeenth-century fortification built upon limestone and mudstone bedrock of the Tyrone Group, which underlies much of this region of County Fermanagh. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 11322.
C17th castle dates from the post-med period, and is classified as a fortification. It is one of over 32,000 scheduled monuments protected across the UK.
C17th castle 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 11322.
Several scheduled monuments lie within 10 km, including Rath (2.9 km), Rath (3 km), Crom castle, crom old castle. castle & garden (4.5 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of C17th castle'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.
C17th castle 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.