© Mapbox · © OpenStreetMap contributors · Boundary data © DfC Northern Ireland (NISMR)
Trivallate enclosure is a probable Iron Age univallate or bivallate earthwork situated near Cookstown in County Tyrone, Northern Ireland. The monument comprises a series of defensive banks and ditches, though the precise number of structural elements remains uncertain. It stands on bedrock of the Tyrone Group, a formation of limestone, mudstone, sandstone and siltstone interspersed with chert, coal and conglomerate, geology that would have presented both opportunities and constraints for its original construction.
The enclosure represents a defensive settlement type characteristic of the Iron Age period in Ulster, when such earthworks served to protect domestic and pastoral communities. The multiple banks suggest a significant investment in fortification, typical of high-status settlements of this era. The monument's survival on the landscape, despite agricultural use of the surrounding area, indicates the substantial engineering effort expended in its creation.
The site is protected by the Historic Environment Division of the Department for Communities under reference 15374, recognising its archaeological significance. The enclosure contributes to understanding Iron Age settlement patterns and defensive strategies across the region. The specific topography and geology of this location would have influenced both the choice of site and the method of construction employed by its Iron Age inhabitants.
Trivallate enclosure is a scheduled monument protected by Department for Communities NI under reference 15374. View the official record →
Trivallate enclosure is a probable Iron Age univallate or bivallate earthwork situated near Cookstown in County Tyrone, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 15374.
Trivallate enclosure dates from the uncertain period, and is classified as a enclosure. It is one of over 32,000 scheduled monuments protected across the UK.
Trivallate enclosure 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 15374.
Several scheduled monuments lie within 10 km, including Stewartstown castle. castle & village (0.3 km), Standing stone (2.9 km), Ballyclog old church. church & graveyard (3.2 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Trivallate enclosure'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.
Trivallate enclosure 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.