Perth stands within one of the most important Roman military landscapes in northern Britain. The city itself did not exist in Roman times, but its location beside the River Tay explains why armies repeatedly operated in the surrounding area.
Discover the Roman stories nearby
Inchtuthil: an unfinished legionary base
The fortress beside the Tay represents a different scale of occupation from an auxiliary fort. Its buried nail hoard illuminates the organised withdrawal.
The Gask Ridge: roads and observation
Follow the evidence for forts, fortlets and towers south-west of Perth. Their chronology and the details of signalling remain research questions.
Explore the Roman sites map
Select the local map below to open the interactive view, then zoom or select a marker. Read the evidence notes below alongside it: a marker shows a recorded location or proposal, not proof that a Roman structure survives.
Open the interactive map full screen
What the evidence establishes
- Bertha, Inchtuthil and Carpow — established Roman military sites. They belong to different phases; map proximity does not make them contemporary.
- The Gask system — established installations; dating and purpose debated. Late-first-century evidence does not securely assign every site to Agricola personally.
- Carpow — a fortress associated with the late-second/early-third-century military landscape. Its precise foundation date and relationship to the Severan campaigns remain debated.
Nearby forts guarded crossings, roads and river traffic. To the south and west, the Gask system linked a chain of forts, fortlets and towers across Strathearn. North of Perth, the legionary fortress at Inchtuthil was intended to anchor Rome’s advance towards the Highlands. More than a century later, the fortress at Carpow supported the campaigns of the emperor Septimius Severus.
The result is not one Roman Perth but several overlapping military landscapes, created at different moments between the late first and early third centuries AD.
Why the Tay mattered
The Tay is both a route and an obstacle. It connects the interior of Scotland with the North Sea, while its crossings channel movement through particular places.
Roman commanders could use the river to transport people and supplies, although the details of naval operations remain imperfectly understood. Roads approaching the Tay linked forts to the south with Strathmore and the Highland edge. Controlling this network allowed the army to move, communicate and sustain campaigns far beyond the established province.
Bertha: guarding the crossing
Bertha Roman fort stood near the meeting of the Rivers Tay and Almond, just north of modern Perth. Its position allowed the garrison to supervise an important crossing and the routes leading into Strathmore.
The site was occupied in more than one Roman period. This repeated use reflects the continuing strategic importance of the Tay corridor rather than the uninterrupted existence of a Roman settlement.
Little can now be seen above ground, but Bertha is essential to understanding why the Perth area mattered. It connected the southern road system with forts farther north and with the wider river network.
Explore Bertha Roman Fort and its archaeological evidence. Read also about the possible Roman bridge across the Tay at Bertha, including the historic mapping and proposed crossing. Its Roman identification should be treated as an interpretation rather than a confirmed surviving Roman bridge.
The Gask Ridge system
South-west of Perth, Roman installations stretched through Strathearn. Forts at Ardoch and Strageath were accompanied by smaller posts and watchtowers along the Roman road.
The Gask system belongs principally to the late first century AD, although its precise relationship to Agricola’s campaigns remains debated and several sites were reused later. It is sometimes described as a frontier, but its precise purpose and chronology remain debated. The towers may have supported communication, observation and the protection of traffic along the road rather than forming a continuous defended barrier.
The Gask landscape is important because it shows Rome organising and monitoring movement north of the Forth before the construction of Hadrian’s Wall or the Antonine Wall.
Inchtuthil: a legionary fortress
About fourteen miles north of Perth, beside the Tay near modern Dunkeld and Blairgowrie, the army built the enormous legionary fortress of Inchtuthil.
It is usually associated with the Twentieth Legion and contained headquarters, barracks, workshops, granaries, officers’ houses and a hospital. Its scale represented a commitment very different from that of a temporary marching camp or auxiliary fort.
Yet Inchtuthil was abandoned before the intended occupation had fully developed. The withdrawal was systematic. A famous hoard of iron nails was buried, probably to prevent valuable metal falling into other hands. The decision reflects a change in imperial priorities rather than proof that the Roman army had been destroyed locally.
Carpow and the Severan campaigns
Carpow stands near the meeting of the Tay and Earn, south-east of Perth. Unlike Inchtuthil and the early Gask installations, Carpow belongs to a later military landscape. It is associated with the Severan campaigns of the early third century, although its precise foundation date remains debated.
The substantial stone fortress probably housed legionary forces and served as a supply and operational base. Its position gave access to both river and land routes. Architectural fragments and inscriptions demonstrate the scale and status of the installation, although many questions remain about its exact development and abandonment.
Carpow shows that Roman interest in northern Scotland did not end with the abandonment of the Antonine Wall. Around four decades after the Antonine withdrawal, emperors and armies again used the Tay as a route into the north.
North from Perth
The military landscape continued beyond the immediate surroundings of the city. Cargill guarded the area around the confluence of the Isla and Tay, while Cardean and Stracathro lay on routes through Strathmore. Temporary camps record the movement of armies whose stays may sometimes have lasted only days.
These sites should not all be treated as components of one system operating at the same moment. Their dates, forms and functions differ. Together, however, they demonstrate how repeatedly Roman forces used the Tay and Strathmore corridors.
Step inside a Roman marching camp
Plan your visit: what survives today
- Perth Museum: begin with the local collections and check which Roman finds are currently displayed.
- Bertha and Carpow: little is exposed above ground. Read the excavation plans and understand the river junctions from legitimate routes; neither is a reconstructed fort.
- Ardoch: the stronger choice for a separate earthwork visit. Inchtuthil is another countryside outing: check access and do not expect standing barracks.
Sources, finds and further reading
Start with the local articles above, then follow the excavation reports, archaeological records and collections below. Historical reports preserve valuable evidence but may use interpretations revised by later work.
- Carpow archaeological record and excavation bibliography
- Inchtuthil archaeological record and excavation bibliography
- Roman Gask Project gazetteer and excavation reports
- Bertha fort: location and archaeological evidence
- National Museums Scotland — Roman collections; check the findspot of each object.
Continue exploring
- Explore Roman sites
- Roman bridge building
- Glossary of Roman archaeology
- The Roman army in Perthshire — Jim Walker’s regional lecture, approximately an hour long.
- Huntingtower Roman watchtower — explore the approach towards Bertha.
- Julia of Strageath — the name IVLIA scratched on an amphora (RIB 2494.135). The find does not establish where the name was scratched or provide a biography. Strageath lies in the wider Strathearn landscape, rather than in Perth itself.
- Women in Roman Scotland — wider context for the Strageath find and frontier households.
