Monument to Mary Jones, with vestiges of her early home, Ty'n-y-ddol is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 10 April 2000. Monument.

Monument to Mary Jones, with vestiges of her early home, Ty'n-y-ddol

WRENN ID
lesser-facade-ash
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
10 April 2000
Type
Monument
Address
Monument to Mary Jones, with vestiges of her early home, Ty'n-y-ddol, Llanfihangel-Y-Pennant, Gwynedd
OS grid reference
SH 673 095
Coordinates
52.66724, -3.96275
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The monument to Mary Jones, which includes remnants of her early home, Ty'n-y-ddol, features outer house walls made of local stone, now reduced to approximately 1.3 meters high. At the northeast end, there is a recessed inglenook. In the center of what was once the living room, there is a rubble pyramid topped with two stages of pink granite, the upper edges chamfered. This supports a rectangular obelisk that is carved on the face with an open bible. An inscription on the base stages tells the story of Mary Jones in both English and Welsh. The area around the monument is paved with flagstones.

Local climate

Monument to Mary Jones, with vestiges of her early home, Ty'n-y-ddol sits in one of the wettest parts of the UK, with an average of 1,390 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 13 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  6. Cottage E of the Church of St Michael Grade II 670 m
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