Ancient Monuments

History on the Ground

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Castell Du Castle Mound

A Scheduled Monument in Llanfihangel-ar-Arth (Llanfihangel-ar-arth), Carmarthenshire (Sir Gaerfyrddin)

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Latitude: 51.9832 / 51°58'59"N

Longitude: -4.2768 / 4°16'36"W

OS Eastings: 243738

OS Northings: 234082

OS Grid: SN437340

Mapcode National: GBR DH.K9S9

Mapcode Global: VH3KX.TFC1

Entry Name: Castell Du Castle Mound

Scheduled Date: 5 July 1951

Source: Cadw

Source ID: 431

Cadw Legacy ID: CM114

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Carmarthenshire (Sir Gaerfyrddin)

Community: Llanfihangel-ar-Arth (Llanfihangel-ar-arth)

Traditional County: Carmarthenshire


The monument comprises the remains of a motte and ditch, dating to the medieval period (c. 1066 -1540 AD). A motte is a large conical or pyramidal mound of soil and/or stone, usually surrounded by either a wet or dry ditch, and surmounted by a tower constructed of timber or stone. The motte at Castell Du measures c 20m in diameter and c 5m high and has a summit diameter of 16m. It is surrounded on all side by a ditch 4m wide and 0.5m deep except on the north east where a section of the mound has been removed by old quarrying.

The monument is of national importance for its potential to enhance our knowledge of medieval defensive practices. The monument is well-preserved and an important relic of the medieval landscape. It retains significant archaeological potential, with a strong probability of the presence of both structural evidence and intact associated deposits.

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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