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Antonine Wall, Twechar Main Street to Bar Hill is a Roman frontier fortification extending across Dunbartonshire in central Scotland. Built around AD 142 under the Emperor Antoninus Pius, the wall formed the northernmost boundary of the Roman Empire, stretching approximately 37 miles from the Firth of Clyde to the Firth of Forth. This section traverses terrain underlain by Carboniferous to Permian dolerite and tholeiitic basalt, which influenced both its construction and survival.
The wall comprised a stone-built base supporting a turf superstructure, fronted by a substantial ditch that exploited the underlying igneous bedrock. Along this stretch lay fortlets and supply installations serving the garrison. The naturally resistant dolerite foundation has preserved the monument's ground plan exceptionally well, with the ditch remaining traceable across the landscape where it was cut into this hard volcanic geology.
Occupied for approximately twenty years before abandonment, the Antonine Wall represents Rome's most ambitious attempt to consolidate control beyond Hadrian's Wall. This section, protected as a scheduled monument by Historic Environment Scotland (SM7054), remains nationally significant as part of the only Roman frontier constructed entirely of turf and stone rather than brick, reflecting both engineering innovation and the strategic priorities of second-century Rome.
Antonine Wall, Twechar Main Street to Bar Hill is a scheduled monument protected by Historic Environment Scotland under reference SM7054. View the official record →
Antonine Wall, Twechar Main Street to Bar Hill is a Roman frontier fortification extending across Dunbartonshire in central Scotland. It is designated a Scheduled Ancient Monument by Historic Environment Scotland under reference SM7054.
Antonine Wall, Twechar Main Street to Bar Hill is a Scheduled Ancient Monument, legally protected by Historic Environment Scotland — the body responsible for designating and safeguarding heritage sites in Scotland. The official designation reference is SM7054.
Several scheduled monuments lie within 10 km, including Bar Hill, Roman temporary camp SW of (0.5 km), Twechar, Roman temporary camp NW of St John of the Cross RC Church (0.6 km), Antonine Wall, Bar Hill, rampart, ditch, fort and Military Way (0.7 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Antonine Wall, Twechar Main Street to Bar Hill'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.
Antonine Wall, Twechar Main Street to Bar Hill stands on Unnamed Igneous Intrusion, Carboniferous To Permian, bedrock that formed in the Permian. The rock here is dolerite and tholeiitic basalt.