Ancient Monuments

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Pen-Gaer Promontory Fort

A Scheduled Monument in Llanboidy, Carmarthenshire (Sir Gaerfyrddin)

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Latitude: 51.8862 / 51°53'10"N

Longitude: -4.6421 / 4°38'31"W

OS Eastings: 218265

OS Northings: 224149

OS Grid: SN182241

Mapcode National: GBR D0.R97G

Mapcode Global: VH2NN.HV8D

Entry Name: Pen-Gaer Promontory Fort

Scheduled Date:

Source: Cadw

Source ID: 2161

Cadw Legacy ID: CM214

Schedule Class: Defence

Category: Promontory Fort - inland

Period: Prehistoric

County: Carmarthenshire (Sir Gaerfyrddin)

Community: Llanboidy

Traditional County: Carmarthenshire


The monument comprises the remains of a defended enclosure, which probably dates to the Iron Age period (c. 800 BC - AD 74, the Roman conquest of Wales). Inland promontory forts are usually located on a ridge or spur with steep slopes on 2 or 3 sides, and artificial ramparts on the level approaches. Alternatively they may have been constructed on a promontory above the confluence of two rivers, or in the bend of a meander. Pen-Gaer has a strong curving bank on its north and west sides. On its east and south sides, there is a weaker bank with a simple entrance, sited above a steep slope. The entrance of the site and the bank on the south and east sides is under scrub while the rest of the site is under pasture. The monument is of national importance for its potential to enhance our knowledge of later prehistoric defensive organisation and settlement. The site forms an important element within the wider later prehistoric context and within the surrounding landscape. The site is well preserved and retains considerable archaeological potential. There is a strong probability of the presence of evidence relating to chronology, building techniques and functional detail. The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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