123 NMS sites 78 within protection zone 28 listed buildings 7 of 9 archaeological periods

Warrenstown is a barony of County Offaly, in the historical province of Leinster (Irish: Baile an Bhairínigh), covering 87 km² of land. The barony records 123 NMS archaeological sites and 28 NIAH listed buildings, placing it at around the 29th percentile among 280 ROI baronies for sites per km². This means it is in the bottom third of all baronies for sites per km². Dated archaeological evidence runs from the Early Bronze Age through to the Modern, spanning 7 of 9 archaeological periods, placing the barony in the 34th percentile among 280 ROI baronies for chronological depth. This means it is in the lower half of all baronies for chronological depth. The largest dated subset of recorded sites dates to the Iron Age.

Detailed boundary map of WARRENSTOWN barony, OFFALY
Warrenstown boundary detail
Regional context map showing WARRENSTOWN barony within OFFALY
Warrenstown in regional context

Heritage at a glance

Percentile rankings throughout this profile compare each barony only against the other 279 Republic of Ireland baronies.

123
Recorded NMS sites
29th percentile
78
Within protection zone
63.4% of recorded sites
28
NIAH listed buildings
13th percentile
87 km²
Barony area

The recorded heritage of Warrenstown

The National Monuments Service Sites and Monuments Record (SMR) is the statutory inventory of archaeological sites for the Republic of Ireland, maintained by the Department of Tourism, Culture, Arts, Gaeltacht, Sport and Media. Sites recorded here include earthworks, ringforts, megalithic tombs, ecclesiastical remains, and post-medieval features; not every record is legally protected, but each is registered as a monument of archaeological interest.

The National Monuments Service records 123 archaeological sites in Warrenstown, putting it at the 29th percentile among 280 ROI baronies for sites per km². This means it is in the bottom third of all baronies for sites per km². Of these, 78 (63%) fall within a recorded monument protection zone. The record is dominated by defensive sites — ringforts, enclosures, hillforts, and stone forts (30 sites, 24% of the total), with industrial sites forming a substantial secondary presence (29 sites, 24%). Structure – peatland is the most prevalent type, making up 24% of the barony's recorded sites (29 records) — well above the ROI average of 15% across all baronies where this type occurs. Structure – peatland is a construction of unknown function, either extant or implied by archaeological evidence, of any date. Other significant types include Road – class 3 togher (14) and Enclosure (12). Road – class 3 togher is a short wooden peatland trackway up to 15m long, deliberately laid to cross a small area of bog; Neolithic to medieval; Enclosure is a banked or ditched feature of uncertain type, used as a catch-all where the original function cannot be determined from surface evidence. Across the barony's 87 km², this gives a recorded density of 1.41 sites per km².

Most common monument types

Hover or tap a monument type to see its definition.

TypeCount
Structure – peatland a construction of unknown function, either extant or implied by archaeological evidence, of any date 29
Road – class 3 togher a short wooden peatland trackway up to 15m long, deliberately laid to cross a small area of bog; Neolithic to medieval 14
Enclosure a banked or ditched feature of uncertain type, used as a catch-all where the original function cannot be determined from surface evidence 12
Fulacht fia a horseshoe-shaped Bronze Age burnt mound built around a sunken trough beside a water source, traditionally interpreted as a cooking site 7
Earthwork an unclassified earthen structure with no diagnostic features that allow a more specific classification 6
Castle – tower house a fortified residential tower of four or five storeys, mostly built by lords in the 15th and 16th centuries and often within a defended bawn 4

Chronological distribution

The dated archaeological record for Warrenstown spans from the Early Bronze Age through to the Modern, with activity attested across 7 of 9 archaeological periods. Every period from earliest to latest is represented in the record — an unbroken sequence of dated activity across the full chronological span. Activity concentrates most heavily in the Iron Age (14 sites, 27% of dated material), with the Medieval forming a secondary peak (10 sites, 19%). A further 71 recorded sites (58% of the overall NMS register for the barony) carry no period attribution — appearing as 'Unknown' in the bar chart below. This typically reflects either records that pre-date the standardised period vocabulary or sites awaiting specialist dating review, rather than a genuine absence of chronological evidence.

Mesolithic
0
Neolithic
0
Early Bronze Age
8
Middle Late Bronze Age
8
Iron Age
14
Early Medieval
8
Medieval
10
Post Medieval
3
Modern
1
Unknown
71

Sample of recorded monuments

Show 25 sample monuments (of 123 total)

A representative sample of 25 recorded monuments drawn from the barony’s 123 total NMS entries. Sites within a recorded monument protection zone and rarer site types are prioritised so the list shows a meaningful cross-section rather than only the most common type. Each entry shows the official Sites and Monuments Record reference number and the description published by the National Monuments Service.

Burial ground

SMR OF004-002—-GarrProtected

Modern burial ground with no above surface indications of any structure of archaeological interest.

Located on good pasture land with the bog to the N and good pasture land to the S, W and E. Large trapezoidal area…

Castle – motte

SMR OF004-006—-GarrmedievalProtected

Large flat-topped mound (H at S c. 5.50m, W at top N-S c. 19m) which drops away steeply at S only, degraded at N and W. Appears to be a natural ridge adopted as a motte with a possible bailey (c. 30m E-W, c. 29m N-S) at…

Moated site

SMR OF004-009—-WoodmedievalProtected

Large trapezoidal shaped enclosure (c. 65m NE-SW x c. 110m SE-NW) defined by a scarp with slight traces of a bank in places and a wide shallow fosse of the N. Evidence of a gap and causeway at SE. Situated in low lying…

Religious house – Franciscan nuns (Poor Clares)

SMR OF004-011001-CoolcorProtected

Appears now as a grass-covered mound with no evidence of any masonry. Situated on a slight rise on high ground. Fragment of cross (OF004-011004-) said to have come from this site now at Rhode Parochial house (OF011-056)…

Building

SMR OF004-011002-CoolcorProtected

Not visible at ground level. Grave-slab in W wall of church at Ballyburly see SMR 11:56 for portion of cross said to have come from this site (SMR 4:13) said to be from here.

The above description is derived from the…

Cross – Wayside cross

SMR OF004-011004-CoolcorProtected

Portion of late medieval wayside cross (H 1m; T 0.4m) located in the front garden of the parochial house in Rhode Village (OF011-056). According to the priest this cross came from the monastic site of Coolcor…

Bullaun stone

SMR OF004-022—-Derryironearly_christianProtected

Boulder (2.30m x 1.4m) with depression (D 0.20m, Diam 0.35m) lying beside field fence as a result of land clearance.

The above description is derived from the published 'Archaeological Inventory of County Offaly'…

Standing stone

SMR OF011-002—-Ballyburlybronze_ageProtected

Standing stone rectangular in plan (0.5m x 0.7m, H 2.2m) orientated N-S with top sloping upwards from S to N and situated on high ground.

Located on high ground with good views with barrow (OF011-055) to the S.…

Burial mound

SMR OF011-007—-Mountwilson,ThornwellProtected

Mound partially destroyed and investigated in 1880's (U.J.A. 1853 276-8), said to be c. 2m H and c. 27m in diam, apparently the W half was removed at this time. Contained parallel graves orientated E-W and at least 40…

Designed landscape – tree-ring

SMR OF011-014—-ToberdalyProtected

Sited on a rise on eastern side of hill, completely levelled. Siting would suggest a ringfort. Marked as an earthwork possible on first edition of the OS 6-inch map. Its close proximity to tree-rings associated with…

Ringfort – rath

SMR OF011-017001-Rathcobicanearly_medievalProtected

Univallate ringfort (int. diam. c. 45m E-W) situated in a low lying area and defined by an earthen bank mainly reduced to a scarp with external fosse. Present remains consists of a raised circular area defined by an…

Children's burial ground

SMR OF011-045—-ToberdalymedievalProtected

Located on top of Madams Hill with tower house (0F011-013—-) nearby. Not visible at ground level. Site was bulldozed a couple of years ago.

The above description is derived from the published 'Archaeological…

Cross – Wayside cross (present location)

SMR OF011-056—-RoadProtected

Fragment of shaft of late-medieval cross situated outside Parochial house in Rhode and said to have come from Coolcor (OF004-011004-) (Comerford 1883, 324). Rectangular shaped shaft (H 0.95m, W 0.25m x 0.2m) with…

House – 17th century

SMR OF011-057—-Ballybrittanpost_medievalProtected

Large two storey five bay gable ended multiperiod structure dating from the late 17th and early 18th-centuries that was built onto the front of a Tower house (OF011-006—-) with flat headed architraved door with tall…

Habitation site

SMR OF011-059—-Toberdaly,CloninProtected

A possible occupation site (dims. 26.6m min. NE-SW x 13.05m min. NW-SE; D 0.25m min.) comprised of a stone spread on the field surface. The stones may have formed a coherent structure; however, machine activity has…

Barrow – unclassified

SMR OF011-060—-Clonin,ToberdalyProtected

A possible barrow (ext. diam. 10.8m; int. diam. 7.86m.) on the field surface. The site consists of a circular stone bank enclosing a flat interior. There is no evidence for an entrance feature, internal ditch or…

Stone head

SMR OF011-057001-BallybrittanProtected

Large two storey five bay gable ended multiperiod house (OF011-057—-) dating from the late 17th and early 18th-centuries that was built onto the front of a Tower house (OF011-006—-) with flat headed architraved door…

Ecclesiastical enclosure

SMR OF004-013006-Ballyburlyearly_christianProtected

Archaeological test-trenching was carried out by Claire Mullins under licence no. 97E0321 on 16 October 1997 at a site adjacent to the late medieval Ballyburley church (OF004-013—-) and cemetery (OF004-013001-), near…

Ritual site – holy well

SMR OF004-026—-Ballyheashillearly_christianProtected

Circular stone-lined spring well (diam. 0.6m; D 0.3m) partially covered over with bog oak timbers which is still in use and known locally as 'Anne's Well', often referred to as the blessed Well. Bog oak timbers form…

Mass-rock

SMR OF011-001001-CloninProtected

National Monument No. 532. In pasture on top of Clonin Hill with extensive views of the surrounding countryside. Impressive view of burial mound (OF010-004001-) on top of Croghan Hill 4.5km to W. Natural rock outcrop…

Castle – unclassified

SMR OF004-012001-BallyburlymedievalProtected

On SW slope of Ballyburly hill with Ballyburly church (OF004-013001-) and graveyard to the E. Not visible at ground level. Late 17th – 18th century house built on site of castle which was burnt in 1888 (Bence-Jones…

Castle – unclassified

SMR OF004-012002-BallyburlymedievalProtected

Ballyburly house, now levelled, said to be on site of castle. Not visible at ground level. Said to be a plantation castle destroyed 1599.

The above description is derived from the published 'Archaeological Inventory…

Church

SMR OF004-013—-BallyburlymedievalProtected

Church built in 1686 according to an inscription on an armorial plaque (OF004-013005-) over the doorway by J. Wakely (Lewis 1837, 125) but was partly destroyed in 1972 and has since been levelled. There was a gothic…

Graveyard

SMR OF004-013001-BallyburlyProtected

Churdh built in 1686 according to an inscription on an armorial plaque (OF004-013005-) over the doorway by J. Wakely (Lewis 1837, 125) but was partly destroyed in 1972 and has since been levelled. There was a gothic…

Structure – peatland

SMR OF010-413—-Cloninbronze_age

Six light roundwoods (L 2.86m min.; Wth 1.18m; D 0.05m min.) arranged in two groups of three at each end of the exposure and have a general NE-SW orientation. Some of the roundwoods are oblique to the main axis of the…

Listed buildings

The National Inventory of Architectural Heritage (NIAH) is a state survey appraising buildings of architectural, historical, archaeological, artistic, cultural, scientific, social, or technical interest. Each surveyed structure receives a rating from International (the highest, for buildings of European importance) through National, Regional, Local, and Record-Only.

The NIAH records only 28 listed buildings in Warrenstown, the 12th percentile across ROI baronies — a relatively thin architectural record. All recorded buildings carry Regional or lower grading; the barony does not contain any structures appraised as being of National or International architectural importance. Construction dates concentrate most heavily in the Late Georgian (1800-1830) period. The most-recorded building type is house (6 examples, 21% of the listed stock).

Terrain and environment

Mean elevation across the barony is 78m — the 40th percentile among 280 ROI baronies for elevation. This means it is in the lower half of all baronies for elevation. Elevation matters for heritage because higher-altitude baronies typically favour defensive monuments — ringforts and hilltop forts placed on prominent ground — while lowland baronies are more likely to carry the dense settlement and church networks of intensive agricultural landscapes. Mean slope is 1.8° — the 1st percentile among 280 ROI baronies for slope. This means it is in the bottom tenth of all baronies for slope. This is broadly flat terrain, the kind of landscape best suited to intensive agriculture. Slope is a key control on both land use and archaeological preservation: steep ground resists ploughing and tends to preserve earthworks intact, while gentle slopes favour intensive cultivation that damages or destroys surface archaeology over time. The Topographic Wetness Index averages 12.0, the 98th percentile among 280 ROI baronies for wetness. This means it is in the top tenth of all baronies for wetness. This is wet, slow-draining ground by ROI standards — the kind of landscape that may carry waterlogged archaeological sites of unusual preservation value. Drainage matters for heritage because poorly-drained ground preserves organic archaeology (wooden trackways, leather, textiles, and on rare occasions human remains) far better than free-draining soil; well-drained ground favours arable use but destroys organic material rapidly. The land-cover mosaic combines improved grassland (78%), woodland (12%), and arable farmland (8%), giving a mixed agricultural and semi-natural landscape.

Terrain measurements

Mean elevation78 m
Max elevation131.4 m
Mean slope1.8°
Wetness index (TWI)11.99 98th pct
Grassland77.6%
Woodland12.1% 29th pct
Cropland7.7%

Where this barony sits in the Republic of Ireland

Drainage
98th
Woodland
29th

Geology and preservation

Bedrock geology shapes the landscape long before any settlement begins — controlling soil drainage, agricultural potential, the survival of upstanding monuments, and the preservation of buried archaeology. The figures below come from the Geological Survey Ireland 1:100,000 bedrock map.

The bedrock underlying Warrenstown is predominantly oolitic limestone (62% of the barony by area), laid down during the Carboniferous period (98% by area, around 359 to 299 million years ago). A substantial secondary geology of limestone (36%) adds further variety to the underlying landscape. The single largest mapped unit is the Edenderry Oolite Member (62% of the barony's bedrock).

Dominant geological periodCarboniferous (98%)
Dominant rock typeOolitic Limestone (62%)
Mapped formations8
Distinct rock types3 25th pct for diversity

Rock type composition

Oolitic Limestone
62%
Limestone
36%
Mafic And Felsic Tuffs
2%

Largest mapped unit: Edenderry Oolite Member (62% of the barony)

Placename evidence

Logainm records 7 heritage-diagnostic placenames for Warrenstown, a modest sample drawn predominantly from the townland record. The dominant stratum is pre-christian defensive. The most frequent diagnostic roots are ráth- (3) and tobar- (2). With a sample of this size the count should be treated as indicative rather than definitive.

Pre-Christian / Early Medieval Defensive

RootCountMeaning
ráth-3earthen ringfort
dún-1hilltop or promontory fort

Early Christian Ecclesiastical

RootCountMeaning
tobar-2holy well
cill-1church (early)

Other baronies in Offaly

See all 280 baronies in the Republic of Ireland Heritage Tool.

Grounding History report mockup

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Grounding History: 10 Maps of Northern Ireland’s Past

If you’re interested in Irish heritage more widely, the companion report for Northern Ireland brings together the analysis of all 462 NI 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. Take a look.

About this profile

Click any section below to expand.

What is a barony?

A barony is a historic administrative unit in Ireland, broadly equivalent to an English hundred. The 280 baronies used here are from the OSi 2019 National Statutory Boundaries (generalised 20m), covering the 26 counties of the Republic of Ireland. Baronies derive from the Norman period, were formalised in the 17th century, and have not been redrawn for statistical purposes. They vary enormously in area, from compact urban baronies in Dublin to vast upland baronies in Connacht, and should not be compared by raw site count without accounting for area differences.

What counts as a site?

This profile combines three distinct heritage registers, each with its own definition of what constitutes a recordable site:

  • Archaeological sites (NMS). The National Monuments Service Sites and Monuments Record (SMR) catalogues every known archaeological monument or site of archaeological interest in the Republic, from prehistoric burial mounds and ringforts to medieval churches and post-medieval defensive works. Inclusion does not require legal protection — only that the site has been identified, surveyed, and assessed as having archaeological value. A separate subset of these sites lies within a recorded protection zone, which gives them statutory protection under the National Monuments Acts.
  • Listed buildings (NIAH). The National Inventory of Architectural Heritage records buildings of architectural, historical, archaeological, artistic, cultural, scientific, social, or technical interest. Each surveyed structure is appraised on a five-tier scale: International, National, Regional, Local, and Record-Only. The NIAH appraisal is informational rather than strictly statutory, but it underpins local-authority Record of Protected Structures (RPS) listings.
  • Heritage placenames (Logainm). Logainm is the authoritative database of Irish placenames maintained by the Placenames Branch. This profile applies a heritage-diagnostic classifier to the Irish-language form of each townland name, flagging roots that signal defensive sites (ráth-, lios-, dún-, caiseal-, cathair-), ecclesiastical foundations (cill-, teampall-, domhnach-, mainistir-), prehistoric burial-ritual features (tuaim-, carn-, leaba-), or Norse-contact settlement (gall-). Townlands without one of these diagnostic roots are not flagged here — they may still carry historical significance, but that significance is not encoded in the name itself.
Editorial principles

The narrative sections of this profile follow several explicit principles:

  • Evidential. Every claim about this barony’s heritage character is anchored in the underlying register data. Where a site count, a placename count, or a percentile rank is cited, it is computed from the source datasets at export time, not estimated.
  • Comparative. Counts and metrics are reported alongside their percentile rank against the other 279 ROI baronies. A barony with 50 ringforts in absolute terms could be unusually high or unusually low depending on its size and regional context; percentile ranking removes that ambiguity.
  • Transparent on limits. Where a register has known coverage gaps, survey biases, or data-quality issues that affect this barony’s figures, the profile flags them rather than presenting the numbers as definitive.
  • No interpretation beyond what the data supports. The narrative does not speculate about historical events, social dynamics, or cultural meaning beyond what the recorded heritage and placename evidence directly attests.
Data caveats and limits
  • NMS Sites and Monuments Record is the product of survey campaigns conducted at different intensities across different counties and decades. Some baronies have been surveyed more thoroughly than others, and absolute counts should be read in that light. Sites destroyed by development before survey are typically not represented; sites in heavily forested or upland terrain are sometimes under-recorded.
  • NIAH coverage is broadly complete for the Republic of Ireland but the survey was conducted on a rolling county-by-county basis, and the most recent appraisal date varies. Buildings demolished or substantially altered after their original survey may still appear in the register; conversely, recent buildings of merit may not yet have been appraised.
  • Logainm classification applies a deliberately conservative pattern-matching approach to the Irish-language townland forms. The classifier prioritises true positives over recall: a townland may carry a heritage signal that the classifier doesn’t recognise, particularly where the diagnostic root has been heavily anglicised or where the townland name draws on a less common term. The 60,000+ townland records and ~9,800 classified placenames give a substantial signal at barony scale, but individual townland names should be checked against Logainm directly for definitive interpretation.
  • Period attribution. The chronological distribution reflects only those NMS sites that carry a recognised period attribution in the source data. Sites listed as “Unknown” period are excluded from the dated subset.
  • Boundary changes. Some baronies have undergone minor boundary adjustments since their 19th-century definition; the OSi 2019 generalised boundaries used here are the current statutory definition and may differ slightly from historical maps in border areas.
  • Bedrock geology is mapped at 1:100,000 scale, which means local variation within a barony — small pockets of different rock type, mineral veins, alluvium overlying bedrock — is generalised. The dominant-system and rocktype figures are area-weighted, so a barony reading “70% Carboniferous limestone” may still contain small but archaeologically important pockets of older or younger rock. Around 3% of GSI polygons do not match the lexicon and contribute no rocktype or system attribution.
Data sources
  • National Monuments Service — Sites and Monuments Record (SMR)
    Contributes archaeological site records, classifications, periods, and recorded protection-zone status.
    © Department of Housing, Local Government and Heritage · Licence: Open data, Creative Commons Attribution 4.0 (CC BY 4.0)
    https://data.gov.ie/dataset/national-monuments-service-archaeological-survey-of-ireland
  • National Inventory of Architectural Heritage (NIAH)
    Contributes listed-building records and architectural-significance grades.
    © Department of Housing, Local Government and Heritage · Licence: Open data, Creative Commons Attribution 4.0 (CC BY 4.0)
    https://data.gov.ie/dataset/national-inventory-of-architectural-heritage-niah-national-dataset
  • Logainm — Placenames Database of Ireland
    Contributes Irish-language and English townland names, civil parish associations, and barony assignments for the heritage-placename classifier.
    © Government of Ireland, Placenames Branch · Licence: Creative Commons Attribution-NoDerivs 3.0 Ireland (CC BY-ND 3.0 IE)
    https://www.logainm.ie/
  • Ordnance Survey Ireland — National Statutory Barony Boundaries 2019
    Contributes the canonical 280 barony boundaries (generalised 20m).
    © Ordnance Survey Ireland / Government of Ireland · Licence: Open data, Creative Commons Attribution 4.0 (CC BY 4.0)
    https://data-osi.opendata.arcgis.com/
  • EURODEM — European Digital Elevation Model
    Contributes elevation, slope, and topographic-wetness statistics, plus the hillshade rendering on each barony’s topographic map.
    © Maps for Europe · Licence: Open data
    https://www.mapsforeurope.org/datasets/euro-dem
  • ESA WorldCover
    Contributes land-cover classifications for grassland, woodland, cropland, wetland, urban, and water statistics.
    © European Space Agency · Licence: Creative Commons Attribution 4.0 (CC BY 4.0)
    https://esa-worldcover.org/en
  • Geological Survey Ireland — 1:100,000 Bedrock Geology
    Contributes bedrock geological data: dominant geological system (Carboniferous, Devonian, etc.), rock-type composition, and formation-level mapping, with the GSI Bedrock Lexicon providing descriptive attributes.
    © Geological Survey Ireland · Licence: Open data, Creative Commons Attribution 4.0 (CC BY 4.0)
    https://www.gsi.ie/en-ie/data-and-maps/Pages/Bedrock.aspx

Explore more: Search any of the 280 ROI baronies, browse by historical province, or read the methodology and data sources for the full Republic of Ireland Heritage Tool.

Spotted an error? This dataset is updated continuously. Email contact@danielkirkpatrick.co.uk with corrections, missing records, or suggestions for improvement.