Ancient Monuments

History on the Ground

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Cwm Tywyll House Platforms

A Scheduled Monument in Llandrillo, Denbighshire (Sir Ddinbych)

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Latitude: 52.8944 / 52°53'39"N

Longitude: -3.4192 / 3°25'9"W

OS Eastings: 304622

OS Northings: 333936

OS Grid: SJ046339

Mapcode National: GBR 6M.PPY6

Mapcode Global: WH78D.GH1Y

Entry Name: Cwm Tywyll House Platforms

Scheduled Date: 27 May 1999

Source: Cadw

Source ID: 1586

Cadw Legacy ID: DE249

Schedule Class: Domestic

Category: House platform

Period: Medieval

County: Denbighshire (Sir Ddinbych)

Community: Llandrillo

Traditional County: Merionethshire


The monument comprises the remains of three rectangular earthen building platforms, which probably date to the Medieval period and are located on the west facing slope of Cwm Tywyll. The platforms measure between 15m and 18m in length and between 6m and 11m in width. All of the platforms are within close proximity to large banked enclosures and linear fields, suggesting they may be contemporary.

The monument is of national importance for its potential to enhance our knowledge of prehistoric/medieval settlement. The monument forms an important element within the wider prehistoric/medieval context and the scheduled area may be expected to contain a wide range of archaeological information, including chronological detail and evidence in regard to construction techniques and agricultural methods. House platforms may be part of a larger cluster of settlement and their importance can further enhanced by their group value. The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive. It is rectangular and measures 80m x 100m.

Source: Cadw

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