Church of Saint Mary is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 29 May 1968. Corn mill.

Church of Saint Mary

WRENN ID
drifting-mullion-thrush
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
29 May 1968
Type
Corn mill
Address
Church of Saint Mary, Llanfair-Is-Gaer, Caernarvon, Y Felinheli
OS grid reference
SH 501 660
Coordinates
53.1702, -4.24305
Source
Cadw listing

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

Description

The Church of Saint Mary is a Grade II listed building constructed from rubble stone with slate roofs. It features a nave, chancel, west bellcote, and south porch. The west bellcote has a rough single arch with a gabled top, and its wall masonry is likely medieval. The church was modified in 1865, with coped gables topped by an eastern cross finial and plain lancet windows. There is a pair of lancets on the west side, two single windows on the north side of the nave, a porch, another pair on the south side of the nave, and a triplet of windows on the east side of the chancel. The porch has a coped gable and a chamfered pointed arch. Traces of old window openings can be seen around the new ones, including a relieving arch cut by the current east window, and reused stone mullions and head-stops in the east wall. The bellcote resembles that of Llanfaglan Church.

Inside, the walls are whitewashed and plastered, with an ashlar chancel arch and window arches. The nave roof features one arch-braced collar truss, while the chancel roof is boarded and has a similar truss, both possibly dating from the 15th century. The medieval font, likely from the early 15th century, is octagonal with relief carvings on three sides depicting a trifoliated circle, a niche, and a foliated cross, with a 19th-century base. A three-bay carved screen from 1928 has delicate tracery framing three square-headed openings, a vine-trail on the beam above, and a pierced patterned cornice, with a similarly carved cross above. The openings on the sides of the screen serve as a pulpit and lectern. There are iron and brass altar rails, and a projecting stone shelf in the east wall to the left of the window, presumably medieval.

The stained glass includes a three-light east window depicting the Resurrection with scrolled texts in patterned quarries by O'Connor & Taylor from 1874, a two-light west window showing Faith and Charity by Mayer of Munich from the late 19th century, and two north windows depicting the Light of the World from 1890 and the Good Shepherd from 1883. There are also two south two-light windows showing St. Patrick and St. Francis from the early 20th century. Memorial plaques in the chancel include a brass to C. Morgans of Rustrad dated 1733, a fine slate and marble memorial to the Wynns of Llanfair from 1730-64 featuring a cherub head beneath and arms in a lozenge above, and a stone plaque dated 1644. Six oil lamps have been converted to electricity.

Local climate

Church of Saint Mary sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 11 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.

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