Ancient Monuments

History on the Ground

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Pen-Sieri Inscribed Stone

A Scheduled Monument in Aberffraw, Isle of Anglesey (Ynys Môn)

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Latitude: 53.2069 / 53°12'24"N

Longitude: -4.4951 / 4°29'42"W

OS Eastings: 233464

OS Northings: 370665

OS Grid: SH334706

Mapcode National: GBR 57.1SNG

Mapcode Global: WH42X.XNND

Entry Name: Pen-Sieri Inscribed Stone

Scheduled Date:

Source: Cadw

Source ID: 3264

Cadw Legacy ID: AN058

Schedule Class: Religious, Ritual and Funerary

Category: Inscribed stone

Period: Early Medieval

County: Isle of Anglesey (Ynys Môn)

Community: Aberffraw

Traditional County: Anglesey


Irregular stone 1.6 m long and 0.4 - 0.46 m square, with 'MAILIS-' in one vertical line. Date 5th C. The lettering is well preserved and clear, it's about 8 cm high and the inscription is 28 cm long.

Once used as a lintel on the inner side of the window opening S of the door in the W wall of the building known as Pensieri Bach, but is now in a barn at Trecastle farm.

The monument is of national importance for its potential to enhance our knowledge of Early medieval stone inscription. It retains significant archaeological potential.

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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