1,221 NMS sites 1,199 within protection zone 95 listed buildings 7 of 9 archaeological periods

Tirerrill is a barony of County Sligo, in the historical province of Connacht (Irish: Tír Oirill), covering 322 km² of land. The barony records 1,221 NMS archaeological sites and 95 NIAH listed buildings, placing it at around the 91st percentile among 280 ROI baronies for sites per km². This means it is in the top tenth of all baronies for sites per km². Dated archaeological evidence runs from the Neolithic through to the Post Medieval, spanning 7 of 9 archaeological periods, placing the barony in the 44th 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 Early Medieval. Logainm flags 45 placenames in the barony as carrying a recognised heritage root; the largest share — around 53% — are names associated with pre-christian defensive.

Detailed boundary map of TIRERRILL barony, SLIGO
Tirerrill boundary detail
Regional context map showing TIRERRILL barony within SLIGO
Tirerrill in regional context

Heritage at a glance

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

1,221
Recorded NMS sites
91st percentile
1199
Within protection zone
98.2% of recorded sites
95
NIAH listed buildings
48th percentile
322 km²
Barony area

The recorded heritage of Tirerrill

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 1,221 archaeological sites in Tirerrill, putting it at the 91st percentile among 280 ROI baronies for sites per km². This means it is in the top tenth of all baronies for sites per km². Protection coverage is near-universal — 1,199 sites (98%) fall within a recorded monument protection zone, indicating an extensively surveyed landscape. The dominant category is defensive sites — ringforts, enclosures, hillforts, and stone forts (766 sites, 63% of the record). Ringfort – rath is the most prevalent type, making up 35% of the barony's recorded sites (425 records) — well above the ROI average of 20% across all baronies where this type occurs. Ringfort – rath is an earthen ringfort enclosed by a bank and external ditch — the most common Early Medieval farmstead, broadly dated 500–1000 AD. Other significant types include Enclosure (134) and Souterrain (78). 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; Souterrain is an underground stone-built passage and chamber, generally Early Medieval and often associated with ringforts as a defensive or storage feature. Across the barony's 322 km², this gives a recorded density of 3.79 sites per km².

Most common monument types

Hover or tap a monument type to see its definition.

TypeCount
Ringfort – rath an earthen ringfort enclosed by a bank and external ditch — the most common Early Medieval farmstead, broadly dated 500–1000 AD 425
Enclosure a banked or ditched feature of uncertain type, used as a catch-all where the original function cannot be determined from surface evidence 134
Souterrain an underground stone-built passage and chamber, generally Early Medieval and often associated with ringforts as a defensive or storage feature 78
Ringfort – cashel the stone-walled equivalent of the rath, found mainly in upland or western areas, broadly dated 500–1000 AD 74
Hut site a low stone or earthen foundation enclosing a small circular or oval area, generally interpreted as a former dwelling, of any date from prehistory to the medieval period 45
Ritual site – holy well a well or spring traditionally associated with a saint, often credited with healing properties; many trace earlier ritual origins but devotion is documented from the medieval period onwards 31
Church a building used for public Christian worship, of any date from c. 500 AD onwards 23

Chronological distribution

The dated archaeological record for Tirerrill spans from the Neolithic through to the Post Medieval, 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 Early Medieval (683 sites, 64% of dated material), with the Iron Age forming a secondary peak (183 sites, 17%). A further 161 recorded sites (13% 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
61
Early Bronze Age
55
Middle Late Bronze Age
38
Iron Age
183
Early Medieval
683
Medieval
33
Post Medieval
7
Modern
0
Unknown
161

Sample of recorded monuments

Show 25 sample monuments (of 1,221 total)

A representative sample of 25 recorded monuments drawn from the barony’s 1,221 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.

Stone row

SMR SL020-170—-BallydawleyProtected

In a coniferous forest, on flat ground. A row of three stones, two of which are upright, aligned NNE-SSW. The NNE stone (c. 0.75m x 0.6m) is prostrate but when upright would have been at least 1.6m high. The centre…

Mill – unclassified

SMR SL020-204—-CollooneyProtected

Not included in the SMR (1989) but listed in the RMP (1995) and classified 'Mill'. On the E bank of the Owenmore river, on the N side of Collooney. Most of the mill complex is demolished though the remains of wheel-pits…

Altar

SMR SL020-218003-CloonmacduffProtected

In the centre of a cashel (SL020-218002-). A large block of stone named 'Druid's Altar' on the 1913 OS 6-inch map. According to Wood-Martin (1887-8, 262-3), it is known locally as 'Patrick's altar' and described as an…

Embanked enclosure

SMR SL021-051—-KnockatoberProtected

In pasture, located in the level base of a broad natural depression ringed by rising ground. The Ballygawley Mountains form a dramatic backdrop on the horizon at N-NE. A circular area (45m E-W) enclosed by a broad earth…

Country house

SMR SL021-109001-CastledarganProtected

Listed in both the SMR (1989) and RMP (1995) and classified 'Castle Possible' and 'Castle Possible Site' respectively. It had originally been classified as a possible castle because, according to Martin Timoney (pers.…

Designed landscape – folly

SMR SL021-109002-CastledarganProtected

Not included in the SMR (1989). Listed in the RMP (1995) and classified 'Church'. This folly is incorporated into the SSE wall of an enclosed orchard immediately to E of Castledargan House (SL021-109001-). The avenue to…

Linear earthwork

SMR SL021-110—-Arnasbrack,Carrownagh,Correagh,Aghamore FarProtected

On top of a mountain ridge, to the NE of Slieve Daeane, with good views in all directions. A heather and sod-covered rise (Wth 2.2m; H 0.9m), partially topped by a post-and-wire fence, extends in a NE-SW direction for…

Hilltop enclosure

SMR SL026-141—-CarrickbanagherProtected

In undulating pasture, on top of a ridge with excellent views of the surrounding countryside. Named 'The Cashel' on the 19 OS 6-inch map, this hilltop enclosure, consists of an oval area (65m N-S; 50m E-W) enclosed by a…

Walled garden

SMR SL026-170—-CollooneyProtected

Not included in the SMR (1989) but listed in the RMP (1995) and classified 'Barrack – Infantry, Possible'. The source of the reference to a 'barrack' at Collooney is unknown (see Timoney 2002). This is a rectangular…

Bullaun stone (present location)

SMR SL027-084001-CarrownspurraunProtected

In a farmyard. Found in a nearby field and moved to its present location (pers. comm. M. A. Timoney). A stone (H 0.4m; Wth 0.65m) with a central circular hollow (Wth c. 0.45m; D c. 0.2m). A beehive quernstone was also…

Promontory fort – inland

SMR SL027-124002-Carrowcashel (Tirerrill By., Riverstown Ed)Protected

In pasture, occupying a rocky bluff at the N end of a low narrow ridge. The roughly rectangular end of the bluff (28m N-S; 17m E-W) is defined to E, N and W by steep slopes topped by low field boundary walls, and to S…

Cross – High cross

SMR SL027-141003-DrumcolumbProtected

In the centre of a graveyard (SL027-141002-), 4m E of the ruin of Drumcolumb church (SL027-141001-) and within the N half of an ecclesiastical enclosure (SL027-141—-). Described by Crawford (1918, 177) as the 'head of…

Religious house – unclassified

SMR SL040-186001-Carricknahorna WestProtected

Incorporated into a farmyard, on an E-facing upland terrace overlooking Lough Arrow to the NE. Two discrete sections of walling survive which appear to be the end-walls of a rectangular building (ext. L 17.5m N-S). Both…

Blockhouse

SMR SL040-189—-BallinafadProtected

In pasture, on a NW-facing slope. The ruin of a four-storey structure consisting of a rectangular block (int.: 6m NE-SW; 4.3m NW-SE) with a circular tower (diam. 4.7m) at each corner (see plan in Waterman 1961, fig.…

Sheela-na-gig

SMR SL034-001002-BehymedievalProtected

Built into the inside wall of a farm building immediately E of Behy Castle (SL034-001001-). A rectangular punch-dressed limestone block (0.85m x 0.45m) which was probably originally a quoin stone in the adjacent castle.…

Barrow – embanked barrow

SMR SL034-014—-Ardkeeran (Tirerrill By.)Protected

In level pasture, near the SE end of a ridge. Views are good to excellent in all directions. A circular raised area (overall diam. 8.65m) defined by an earthen bank (int. H 0.25-0.35m; ext. H 0.55-0.65m). The internal…

Ritual site – holy tree/bush

SMR SL034-070001-CoollemoneenProtected

In rough pasture, on the N-facing slope of a low rise. A mature sycamore tree grows on the S edge of a penitential cairn (SL034-070002-). Wood-Martin (1892, 372) referred to the many legends and traditions attached to…

Cross – Tau cross

SMR SL034-085005-Tawnagh (Tirerrill By.)Protected

In Tawnagh graveyard (SL034-085002-), just inside the E boundary wall and 10.8m E of the gable of a ruined church (SL034-085001-). A Tau cross (H 0.51m) is set upright in a line of low uninscribed grave-markers and…

Barrow – stepped barrow

SMR SL034-140001-BullaunProtected

In undulating elevated pasture, on a slight NNW-facing slope. There are excellent views N-SE though views are moderate to poor in other directions. A slightly raised circular area (diam. 22m) defined by a fosse (Wth 2m;…

Holed stone

SMR SL034-183—-BrickeenProtected

In a wall bounding a narrow road which forms the townland boundary between Brickeen and Bellanagarrigeeny or Castlebaldwin. A limestone slab (H 0.7m; Wth 0.55) set upright in the stone wall. A circular perforation…

Religious house – Dominican friars

SMR SL034-211001-BallindoonProtected

In pasture, on a S-facing slope overlooking Lough Arrow and forming the SW corner of Ballindoon graveyard (SL034-211002-), which lies within an early ecclesiastical enclosure (SL034-21104-). The priory is on a ledge…

Kerb circle

SMR SL035-042—-Cabragh (Tirerrill By.),GarokeProtected

In pasture, on an E-facing slope amidst rock outcrops. A roughly circular area (diam. 17m x 18m) enclosed by 25 almost contiguous stones. The stones range in size from 0.95m x 0.45m to 1.3m x 2m. Most are bedded on…

Kiln – corn-drying

SMR SL035-045002-Cabragh (Tirerrill By.)Protected

In the interior of a cashel (SL035-045001-). An oval stone-built structure (int. diam. 5m x 6m; H 0.4m; wall T 1.5m) with a curving entrance passage (L 4.9m; Wth 0.95m) on its E side.

The above description is derived…

Tomb – unclassified

SMR SL035-073002-DerrysallaghProtected

In mountain bog, on a SW-facing slope and 8m NE of 'Toberelba', a holy well (SL035-073001-). 'St Elba's Grave' consists of three elements: a flat slab, an upright slab and a modern cross. The flat uninscribed…

Ringfort – rath

SMR SL026-028—-Markree Demesneearly_medievalProtected

In undulating pasture, on a rise and within the demesne of Markree Castle (SL026-038—-). A raised circular area (int. diam. 21m) enclosed by a ruinous stone wall (T 2.7m; int. H 0.5m; ext. H 3m) and an external fosse…

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 95 listed buildings in Tirerrill (48th percentile across ROI baronies). The highest-graded structures include 2 of National significance. The Republic holds 937 National-graded buildings in total, so this barony accounts for around 0% of the national total. Construction dates concentrate most heavily in the Victorian (1830-1900) period. The most-recorded building type is house (23 examples, 24% of the listed stock).

Terrain and environment

Mean elevation across the barony is 107m — the 65th percentile among 280 ROI baronies for elevation. This means it is in the upper 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. The barony reaches 452m at its highest point — a vertical span of more than 345m within its boundary, indicating significant topographic diversity. Mean slope is 5.8° — the 81st percentile among 280 ROI baronies for slope. This means it is in the top fifth of all baronies for slope. This is consistently steep terrain by ROI standards, the kind of landscape that tends to preserve upstanding archaeological features well. 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 9.9, the 21st percentile among 280 ROI baronies for wetness. This means it is in the bottom third of all baronies for wetness. This is well-drained ground by ROI standards — typical of upland or steeply-sloping country that sheds water rapidly. 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 (67%), woodland (27%), and open water (5%), giving a mixed agricultural and semi-natural landscape. In overall character, this is steeply-sloping terrain at modest elevation, with land use dominated by improved grassland.

Terrain measurements

Mean elevation107 m
Max elevation452.4 m
Mean slope5.8°
Wetness index (TWI)9.94 21st pct
Grassland67.1%
Woodland26.8% 93rd pct

Where this barony sits in the Republic of Ireland

Drainage
21st
Woodland
93rd

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 Tirerrill is predominantly limestone (58% of the barony by area), laid down during the Carboniferous period (89% by area, around 359 to 299 million years ago). Limestone is the most heritage-rich bedrock in Ireland. It supports fertile, well-drained soils that favoured dense Early Medieval settlement and Norman manorial agriculture, and it weathers into karst features — sinkholes, caves, swallow holes, and souterrains — that frequently carry archaeology. Where peat overlies limestone, organic preservation can be exceptional. A substantial secondary geology of shale, limestone (16%) adds further variety to the underlying landscape. The single largest mapped unit is the Lower Bricklieve Limestone Formation (34% of the barony's bedrock). With 11 distinct rock types mapped, the barony sits in the top third of ROI baronies for geological diversity (94th percentile) — typically a sign of complex tectonic history or coastal mosaics of differing rock units.

Dominant geological periodCarboniferous (89%)
Dominant rock typeLimestone (58%)
Mapped formations28
Distinct rock types11 94th pct for diversity

Rock type composition

Limestone
58%
Shale, Limestone
16%
Paragneisses
7%
Shale And Minor Sandstone
4%
Psammitic Paragneisses
2%

Largest mapped unit: Lower Bricklieve Limestone Formation (34% of the barony)

Placename evidence

Logainm records 45 heritage-diagnostic placenames for Tirerrill, drawn from townland and civil-parish names across the barony. The dominant stratum is pre-Christian and Early Medieval defensive — ráth-, lios-, dún-, and caiseal-prefixed names that mark Iron Age and early historic settlement. The leading diagnostic roots are cill- (15 — church), lios- (8 — ringfort or enclosure), and ráth- (6 — earthen ringfort). This is above the ROI average of 30.7 heritage placenames per barony. The presence of multiple heritage strata side by side indicates layered occupation of the landscape across successive prehistoric and historic periods. Logainm records 287 placenames for Tirerrill (predominantly townland names). Of these, 45 (16%) carry one of the diagnostic Gaelic roots tracked above; the remainder draw on more generic landscape vocabulary that does not encode a heritage period.

Pre-Christian / Early Medieval Defensive

RootCountMeaning
lios-8ringfort or enclosure
ráth-6earthen ringfort
dún-6hilltop or promontory fort
caiseal-3stone ringfort

Early Christian Ecclesiastical

RootCountMeaning
cill-15church (early)
tobar-4holy well
cillín-1unconsecrated burial ground

Burial, Ritual, and Norse-Contact

RootCountMeaning
dumha-1mound

Other baronies in Sligo

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.