Ancient Monuments

History on the Ground

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Old Castle motte

A Scheduled Monument in Llanelli, Carmarthenshire (Sir Gaerfyrddin)

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Latitude: 51.6819 / 51°40'54"N

Longitude: -4.1705 / 4°10'13"W

OS Eastings: 250043

OS Northings: 200361

OS Grid: SN500003

Mapcode National: GBR GS.V01L

Mapcode Global: VH3MB.NZLH

Entry Name: Old Castle motte

Scheduled Date: 3 December 2003

Source: Cadw

Source ID: 4053

Cadw Legacy ID: CM323

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Carmarthenshire (Sir Gaerfyrddin)

Community: Llanelli

Built-Up Area: Llanelli

Traditional County: Carmarthenshire


The monument comprises the remains of a medieval motte and bailey castle. The mound measures roughly 30m in diameter; it is partially submerged within the reservoir of the former Old Castle Tinplate works. The motte has been identified as likely site of the historic Castle of Carnwyllion, destroyed by Rhys Ieuanc of Dinefwr (d. 1222) during his attack on Kidwelly and the Gower in 1215.

The monument is of national importance for its potential to enhance our knowledge of medieval defensive organisation. The monument forms an important element within the wider medieval context and the structure itself may be expected to contain archaeological information in regard to chronology, building techniques and functional detail.

The area scheduled comprises the remains described and an area around them within which related evidence may be expected to survive. It is circular and measures 30m in diameter.

Source: Cadw

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