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Bryn-Glas Roman Signal Station is a Roman watchtower situated in Wales on bedrock composed of Llanvirn rocks of Whiterock age, formed from mudstone, siltstone and sandstone. Signal stations of this type were built across the Roman frontier zones to provide rapid communication between forts and to monitor movement across the landscape. Their elevated positions allowed visibility across significant distances, making them essential nodes in the military communications network that maintained Roman control and security.
The station's location on naturally higher ground would have afforded commanding views across the surrounding terrain, typical of the strategic placement adopted for such installations. The solid Llanvirn bedrock beneath the site provided a stable foundation for construction, and the mixed geology of the underlying strata—mudstone, siltstone and sandstone—would have offered readily available stone for building materials, as was standard practice in Roman military architecture.
The site is protected by Cadw, the Welsh Historic Monuments organisation, under reference CN188, ensuring its preservation as an important record of Roman military infrastructure and strategic thinking in Wales. Such signal stations represent an often-overlooked but crucial element of Roman frontier administration, forming part of the broader network that supported military operations and communication across the occupied province.
Bryn-Glas Roman Signal Station is a scheduled monument protected by Cadw under reference CN188. View the official record →
Bryn-Glas Roman Signal Station is a Roman watchtower situated in Wales on bedrock composed of Llanvirn rocks of Whiterock age, formed from mudstone, siltstone and sandstone. It is designated a Scheduled Ancient Monument by Cadw under reference CN188.
Bryn-Glas Roman Signal Station dates from the roman period, and is classified as a signal station. It is one of over 32,000 scheduled monuments protected across the UK.
Bryn-Glas Roman Signal Station is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is CN188.
Several scheduled monuments lie within 10 km, including Pen-yr-Orsedd Quarry, Blondins and Associated Structures (9.4 km), Huts & Field Systems NE of Nantlle (9.6 km), Pen Y Bryn Quarry and tips (9.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Bryn-Glas Roman Signal Station'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.
Bryn-Glas Roman Signal Station stands on Llanvirn Rocks (Undifferentiated), bedrock that formed in the Whiterock. The rock here is mudstone, siltstone and sandstone.