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Bog Head Rath and Souterrain is an early medieval defended homestead situated in County Antrim, Northern Ireland. The monument comprises a circular earthwork rampart characteristic of Irish raths, paired with an underground stone-lined passage known as a souterrain. These dual structures date to the early Christian period and represent a common settlement pattern in early medieval Ireland, where the rath provided domestic enclosure and defence whilst the souterrain served storage, refuge or ritual purposes. The site is constructed upon bedrock of Palaeogene mafic lava and tuff, the volcanic geology that underlies much of the Antrim plateau and shapes the wider landscape.
The rath's circular design and the integration of the souterrain demonstrate the practical and symbolic concerns of early medieval householders. Such settlements were typically occupied by families of status, and the provision of subterranean space was a distinctive feature of Irish settlement practice during this period. The combination of ringwork and underground passage reflects both the architectural conventions and the social organisation of early Christian Ireland.
Bog Head Rath and Souterrain is recorded in the Historic Environment Division's protected monuments register under reference 3532, recognising its importance as evidence of early medieval settlement patterns and construction techniques in Ulster.
Bog head. rath and souterrain is a scheduled monument protected by Department for Communities NI under reference 3532. View the official record →
Bog Head Rath and Souterrain is an early medieval defended homestead situated in County Antrim, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 3532.
Bog head. rath and souterrain dates from the e.christ. period, and is classified as a rath & souterrain. It is one of over 32,000 scheduled monuments protected across the UK.
Bog head. rath and souterrain 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 3532.
Several scheduled monuments lie within 10 km, including Rath group - univallate rath, counterscarp rath & trivallate rath (6 km), Counterscarp rath (6.4 km), Bivallate rath (6.6 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Bog head. rath and souterrain'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.
Bog head. rath and souterrain stands on Unnamed Extrusive Rocks, Palaeogene, bedrock that formed in the Paleogene. The rock here is mafic lava and mafic tuff.