Ancient Monuments

History on the Ground

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Pen Dinas Camp

A Scheduled Monument in Llandygai (Llandygái), Gwynedd

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Latitude: 53.1912 / 53°11'28"N

Longitude: -4.0818 / 4°4'54"W

OS Eastings: 261009

OS Northings: 368033

OS Grid: SH610680

Mapcode National: GBR 5R.2YS9

Mapcode Global: WH54G.81JX

Entry Name: Pen Dinas Camp

Scheduled Date:

Source: Cadw

Source ID: 3615

Cadw Legacy ID: CN120

Schedule Class: Defence

Category: Hillfort

Period: Prehistoric

County: Gwynedd

Community: Llandygai (Llandygái)

Built-Up Area: Tregarth

Traditional County: Caernarfonshire


The monument comprises the remains of a small hillfort, which probably dates to the Iron Age period (c. 800 BC - AD 74, the Roman conquest of Wales). Hillforts are usually located on hilltops and surrounded by a single or multiple earthworks of massive proportions. Hillforts must have formed symbols of power within the landscape, while their function may have had as much to do with ostentation and display as defence.

Pen Dinas Camp occupies the end of a spur, with a dry valley to the NW and a steep slope down to the Afon Ogwen to the E. The hillfort defences consisted of a rampart 5-6 m wide faced with large boulders and an inner core of stone rubble. The rampart is well preserved on the N side, badly robbed and disturbed along the W side and absent on the SE where the natural slope is very steep. The entrance was at the SW, just N of the present field boundary wall, with a hut or guard chamber just inside to the N. The NW corner of the rampart appears to have been of greater thickness and the N section shows a second internal face or step in places, possibly indicating two phases of construction.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric settlement and defence. The site forms an important element within the wider later prehistoric context and within the surrounding landscape. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits 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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