SEAGAHAN covers 342.5 km² in Northern Ireland. With 58 historic sites and 11 scheduled monuments on record, the ward sits at the 68th percentile across all 462 NI wards for combined archaeological heritage. It also records 25 listed buildings (HED Historic Buildings Record), the 55th percentile for listed-building density across NI wards. Per 1,000 residents, this works out at 17.0 recorded sites — the 56th percentile across NI wards (a measure of heritage density relative to current population). Dated archaeological evidence runs from the Mesolithic through to the Modern period, spanning 6 archaeological periods, around the NI median for chronological depth.
Heritage at a glance
Percentile rankings throughout this profile compare each ward only against the other 461 Northern Ireland wards.
Population context
The recorded heritage of SEAGAHAN
Of the 58 historic sites recorded, the most common are Enclosure (8, 14% of historic sites), Tree Ring (4), and Rath (4). For Enclosures, this is the 62nd percentile among NI wards that record this type. For Tree Rings, this is the 69th percentile among NI wards that record this type. Across the ward's 342.5 km², this gives a recorded density of 0.27 sites per km² (all heritage types combined). Scheduled monuments are distributed across approximately 0.10° of latitude and 0.08° of longitude within the ward, indicating dispersed rather than clustered placement.
Most common monument types
| Type | Count | Description |
|---|---|---|
| Enclosure | 8 | — |
| Tree Ring | 4 | — |
| Rath | 4 | — |
Chronological distribution
Note: 16% of historic site records carry an ‘Unknown’ period attribution. The chronological breakdown above reflects only the dated subset.
Terrain and environment
A mean elevation of 195m places this ward in the top 6% of NI wards by altitude, with a maximum of 366m giving the ward meaningful vertical relief. The terrain is consistently steep, with a mean slope of 5.5° (81th percentile across NI). The ward is well-drained, with a Topographic Wetness Index of 9.8 (15th NI percentile) — characteristic of upland or steeply-sloping ground that sheds water rapidly. The land cover is dominated by improved grassland (83%) and woodland (14%). In overall character, this is an upland landscape of steep, elevated terrain, with land use dominated by improved grassland.
Terrain measurements
Where this ward sits in NI
Geology and preservation
The dominant bedrock formed during the Palaeozoic era (Silurian period). Ancient sedimentary or metamorphic rock dating to before the age of dinosaurs; the resulting landscape has been long-stable enough to host every period of human activity. Peat covers 4% of the ward — a minor share, but where it occurs it can preserve organic finds in good condition. Bedrock composition is uniform (complexity index 0.10), with a single dominant geological unit underlying most of the ward. A uniform geology narrows the natural lithic-resource base available to past inhabitants.
Placename evidence
The combined OSNI, Logainm NI, and GeoNames sources record 59 placenames for this ward. Diagnostic heritage strata identified within these are: 8 pre-Christian defensive (rath-, dún-, lios-, caiseal-), 3 ecclesiastical (cill-, teampall-, mainistir-, díseart-), and 1 Norse coastal (fjord-derived names, Viking-age trading sites). Note: Irish-language (name_ga) forms are recorded for roughly half of NI placenames in the combined sources, so anglicised forms whose Irish original could belong to multiple categories may be misclassified.
Placename categories
Scheduled monuments in SEAGAHAN
Scheduled monuments are sites legally protected under the Historic Monuments and Archaeological Objects (Northern Ireland) Order 1995, designated by the Historic Environment Division (HED).
| Monument | Type | Period |
|---|---|---|
| Bivallate rath: Devlin's Fort | Bivallate Rath: Devlin'S Fort | Iron Age |
| Standing stone: the Grey Stone | Standing Stone: The Grey Stone | Early Bronze Age |
| Multivallate rath: Gordon's Fort | Multivallate Rath: Gordon'S Fort | Iron Age |
| Cashel: the relig | Cashel: The Relig | Early Medieval |
| Portal tomb | Portal Tomb | Neolithic |
| Megallithic tomb | Megallithic Tomb | Unknown |
| Passage tomb: Vicar's Cairn | Passage Tomb: Vicar'S Cairn | Neolithic |
| The Danes Cast (north) – Linear earthwork visible at several points | The Danes Cast (North) – Linear Earthwork Visible At Several Points | Iron Age |
Recorded historic sites
| Name | Period | Type |
|---|---|---|
| A.P. SITE – circular enclosure | Iron Age | Unknown |
| A.P. SITE – large oval mound | Unknown | Unknown |
| AP Cropmark | Unknown | Unknown |
| Armaghbrague Parish Church & Graveyard and Well | Post-Medieval | Ritual/Funerary |
| BARROW (unlocated) | Mesolithic | Ritual/Funerary |
| BIVALLATE RATH: DEVLIN'S FORT | Early Medieval | Defence |
| CAIRN: THE GREEN HEIGHT | Mesolithic | Ritual/Funerary |
| CASHEL | Early Medieval | Defence |
| CASHEL; SOUTERRAIN; reused as KILLEEN or children's graveyard: THE RELIG; RELIG-AN-CHAISILL | Early Medieval | Ritual/Funerary |
| CHURCH & GRAVEYARD (site of) & ENCLOSURE: KIRKHILL, CLONCONCHY | Medieval | Ritual/Funerary |
Listed buildings in SEAGAHAN
| Address / Name | Grade | Period |
|---|---|---|
| BRIDGE 1 DUNDRUM ROAD TASSAGH CO.ARMAGH | B2 | — |
| 52 Lisnagat Road Markethill Co. Armagh BT60 1SR | B2 | 1800 – 1819 |
| TASSAGH HOUSE 15 BLAIRMOUNT ROAD TASSAGH KEADY CO.ARMAGH | B1 | — |
| MILL VIEW HOUSE DUNDRUM ROAD TASSAGH CO.ARMAGH | B2 | — |
| GATES OF DUNDRUM DUNDRUM ROAD TASSAGH CO.ARMAGH | B1 | — |
| DARKLEY HOUSE DARKLEY KEADY CO.ARMAGH | B1 | — |
| DUNLARG HOUSE 217 KEADY ROAD ARMAGH | B2 | — |
| ENTRANCE GATES AT DUNLARG HOUSE 217 KEADY ROAD ARMAGH | B2 | — |
| FORMER CORN MILL AND BEETLING MILL DUNDRUM ROAD TASSAGH CO.ARMAGH | B2 | — |
| FORMER BEETLING MILL DUNDRUM ROAD TASSAGH CO.ARMAGH | B2 | — |
Discover more in Armagh City, Banbridge and Craigavon
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See all 462 wards in the Northern Ireland Heritage Tool.
Want a deeper view?
Grounding History: 10 Maps of Northern Ireland’s Past
A spatial history report bringing together analysis of all 462 wards into one place through 10 high-quality maps — covering monument density, archaeological periods, placename heritage, terrain, wetland, and the historic landscape at first survey.
About this profile
What is a ward?
A ward is the smallest electoral and statistical geography used by the Northern Ireland Statistics and Research Agency (NISRA). The boundaries used here are the 2014 NISRA / OSNI Wards (462 across Northern Ireland), each typically covering 1-700 km² and a population of a few thousand. Wards do not align with parishes, townlands, or any historic administrative unit — they are a modern statistical convenience, used here only as a fixed spatial frame within which to summarise heritage records.
What counts as a site?
Three distinct heritage record types are reported separately, not combined: (1) Historic Sites — entries in the Northern Ireland Sites and Monuments Record (NISMR), the inventory of recorded archaeological sites and findspots, dated from prehistoric to early-modern; (2) Scheduled Monuments — sites legally protected under the Historic Monuments and Archaeological Objects (NI) Order 1995 and maintained by the Historic Environment Division (HED); (3) Listed Buildings — buildings of architectural or historic interest protected under the Planning Act (NI) 2011 and graded A, B+, B1, B2, or Record-Only by HED. A site appearing in more than one register is counted in each register independently.
Editorial principles
These ward profiles describe evidence, not history. They report what is recorded, not what occurred. Where the data is ambiguous, we say so. We do not infer historical processes — population movements, settlement expansion, periods of decline — from patterns in the record. Absence of evidence is not evidence of absence: in Northern Ireland, where antiquarian survey was uneven and modern excavation is geographically biased, a gap in the record almost always reflects the limits of recording rather than a genuine historical absence. We mark such gaps explicitly where they appear in the data.
Limits of coverage and known caveats
Several caveats apply to every ward profile: (1) NISMR coverage is uneven across NI — some areas (notably parts of the south-east and the Belfast urban fringe) have been more intensively surveyed than others, so a low recorded site count does not reliably indicate a low past density of activity; (2) period attributions in NISMR are often 'Unknown', and chronological breakdowns reported here reflect only the dated subset; (3) placename classification depends on the Irish-language form (name_ga), which is recorded for approximately 50% of NI placenames in the combined sources, so ecclesiastical and pre-Christian counts may be understated where anglicised forms remain unparsed; (4) terrain percentile ranks compare each ward only to the other 461 NI wards; they are not absolute thresholds. For absence-dominant land cover categories (wetland, water, cropland), percentile ranks are suppressed below 1% raw value, since the ranking of zero-value wards is not meaningful.
Data sources (11)
- Northern Ireland Sites and Monuments Record (NISMR) https://www.communities-ni.gov.uk/articles/nismr-public-mapviewer
- HED Scheduled Monuments Dataset https://www.opendatani.gov.uk/@historic-environment-division/scheduled-monuments-northern-ireland
- HED Historic Buildings Record https://www.communities-ni.gov.uk/topics/historic-environment/listed-buildings
- OSNI OS Open Names (Northern Ireland) https://www.opendatani.gov.uk/@ordnance-survey-of-northern-ireland/osni-open-data—50k-gazetteer
- Logainm — Placenames Database of Ireland https://www.logainm.ie/
- GeoNames https://www.geonames.org/
- Census 2021 (Northern Ireland) https://www.nisra.gov.uk/statistics/2021-census
- OSNI Open Data — Largescale Boundaries https://www.opendatani.gov.uk/@ordnance-survey-of-northern-ireland/osni-open-data-largescale-boundaries-wards-2012
- Copernicus GLO-30 DEM https://spacedata.copernicus.eu/collections/copernicus-digital-elevation-model
- ESA WorldCover https://esa-worldcover.org/
- GSNI 1:250,000 Geology https://www.bgs.ac.uk/geological-data/maps/