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Duncrue Fort is a medieval motte and bailey fortification located at Carrickfergus in County Antrim, Northern Ireland. The monument consists of a substantial motte with two adjoining baileys, a defensive arrangement typical of Anglo-Norman settlement in twelfth-century Ireland. The site occupies a naturally commanding position on the Carrickfergus peninsula, built upon bedrock composed of Palaeogene extrusive rocks formed from ancient mafic lavas and tuffs, which provides a stable foundation for the earthworks. This volcanic geology is characteristic of the wider Lough Neagh basin and would have offered good drainage for the fortification.
The twin-bailey plan reflects the sophisticated defensive thinking of the Norman period, with the earthen motte serving as the primary strongpoint and the two baileys providing enclosures for additional buildings, livestock and domestic activity. The arrangement allowed for segregation of functions and enhanced defensive capacity. Such fortifications were instrumental in establishing Norman control over newly conquered Irish territories during the late twelfth century.
Duncrue Fort is protected as a scheduled monument under reference 3317 by the Historic Environment Division, recognising its archaeological and historical significance as evidence of medieval military architecture and settlement patterns in Ulster.
Duncrue fort. motte with 2 baileys is a scheduled monument protected by Department for Communities NI under reference 3317. View the official record →
Duncrue Fort is a medieval motte and bailey fortification located at Carrickfergus in County Antrim, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 3317.
Duncrue fort. motte with 2 baileys dates from the medieval period, and is classified as a motte & baileys. It is one of over 32,000 scheduled monuments protected across the UK.
Duncrue fort. motte with 2 baileys 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 3317.
Several scheduled monuments lie within 10 km, including The mount. raised rath (2.6 km), Ring barrow (3 km), Ring barrow (3.2 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Duncrue fort. motte with 2 baileys'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.
Duncrue fort. motte with 2 baileys stands on Unnamed Extrusive Rocks, Palaeogene, bedrock that formed in the Paleogene. The rock here is mafic lava and mafic tuff.