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Cof Cymru: National Historic Assets of Wales · Wales

Lower Roman Fort

Caernarfon, Gwynedd, Wales

The record

Designation
Scheduled monument
Site type
Fort
Period
Roman
Welsh name
Hen Walia
Community
Caernarfon
Unitary authority
Gwynedd
Country
Wales
Coordinates (centre of the scheduled area)
53.13689, -4.26985
SAM number
CN094
Cadw record number
3606

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1883 "Watershed map England, Wales 3." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

The following provides a general description of the Scheduled Monument.

The scheduled area is divided into two parts. To the W of the main Caernarfon road is a triangular piece of land which now contains a petrol filling station; no archaeological features can be seen in this area. To the E of the main road lie the remains of the Roman wall, and it is only the wall which is scheduled on this side of the road. The S wall is clearly visible, rising to a height of some 4 m and containing a blocked gateway 2.9 m wide. The W end of this wall is suffering some damage from vegetation growing on the wall, and the E end has been built against.

The E wall forms the rear wall of a row of gardens, and has been obscured in places by buildings. Much of the outer face of this wall is missing, revealing a mortared rubble interior. The upper part of the wall is covered for much of its length in a mass of firmly embedded ivy, which is causing some damage to the structure of the wall.

The monument is of national importance for its potential to enhance our knowledge of Roman settlement and defence. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structures themselves may be expected to contain archaeological information concerning chronology and building techniques.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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