Ancient Monuments

History on the Ground

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Site 300m south west of Tan-llan (revealed by aerial photography)

A Scheduled Monument in Llanfair Caereinion, Powys

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Latitude: 52.655 / 52°39'18"N

Longitude: -3.323 / 3°19'22"W

OS Eastings: 310600

OS Northings: 307187

OS Grid: SJ106071

Mapcode National: GBR 9S.5SL8

Mapcode Global: WH79L.XJSG

Entry Name: Site 300m SW of Tan-llan (revealed by aerial photography)

Scheduled Date: 10 March 1980

Source: Cadw

Source ID: 3004

Cadw Legacy ID: MG203

Schedule Class: Defence

Category: Hillfort

Period: Prehistoric

County: Powys

Community: Llanfair Caereinion

Built-Up Area: Llanfair Caereinion

Traditional County: Montgomeryshire


The monument consists of the remains of a defended enclosure, which probably dates to the Iron Age period, (c.800BC – AD74, the Roman Conquest of Wales). The site consists of a sub-circular, trivallate enclosure c.200m in diameter with narrow spaced outer ramparts. The innermost enclosure survives as an earthwork, although in a degraded state. The enclosure is set upon a gently sloping plateau above the Afon Banwy.

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 in the wider later prehistoric context and within the surrounding landscape.

Source: Cadw

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