---
title: "St Mary, Treuddyn"
description: "Located in Treuddyn, Flintshire. Built 1874–75, on an earlier medieval site. Diocese of St Asaph. Grade II. Gothic Revival style."
category: "Church"
tags: ["Church","Church in Wales","Flintshire","Treuddyn","Grade II","Gothic Revival","T H Wyatt"]
canonical: "https://thebritishgazette.com/post/st-mary-treuddyn"
pubDate: "2026-09-06T02:57:11.619Z"
dateModified: "2026-09-08T15:59:46.197Z"
location: "Treuddyn, Flintshire"
country: "Wales"
county: "Flintshire"
town: "Treuddyn"
address: "Ffordd y Llan, Treuddyn, Flintshire, CH7 4LN"
postcode: "CH7 4LN"
built: "1874–75, on an earlier medieval site"
architect: "T H Wyatt"
denomination: "Church in Wales"
dedications: ["Mary"]
diocese: "St Asaph"
grade: "II"
style: "Gothic Revival"
materials: "Roughly dressed stone in regular courses; slate roof"
website: "http://moldmissionarea.weebly.com/"
openingHours: "Sunday Service 9.30am. Open for private prayer every Wednesday between 10am and 4pm."
parish: "Treuddyn"
listEntryUrl: "https://cadwpublic-api.azurewebsites.net/reports/listedbuilding/FullReport?id=19648&lang=en"
gridReference: "SJ 253 580"
---

# St Mary, Treuddyn

St Mary’s is a Grade II Church in Wales parish church on Ffordd y Llan, Treuddyn, Flintshire, in the Diocese of St Asaph, listed for its reused medieval stained glass.

## Overview

Cadw records the present church as a Gothic Revival rebuild of 1874–75 by T. H. Wyatt (1807–1880), which replaced a double-naved medieval church. Clergy are recorded on the site from the eleventh century. The building is of roughly dressed stone in regular courses under a slate roof: a nave with clerestory, lower apsidal chancel, north and south aisles, a south porch, and a bellcote above the chancel arch. The west end has three trefoil-headed lancets below a circular window; aisle windows are paired trefoil-headed lancets and the clerestory has cusped circular lights.

The interior is a plain five-bay space. Cadw lists the church for the high-quality glass reset in the apse: fragments ascribed to the fourteenth and sixteenth centuries, now in the north and south windows. The north lights show early fourteenth-century monks under canopies; Mostyn-Lewis suggested a date of about 1305 for some of the glass and compared it with Merton College, Oxford. A Grade II sundial of 1803 stands on the axial path to the south porch.

## Further Information

- [Cadw listed building 19648](https://cadwpublic-api.azurewebsites.net/reports/listedbuilding/FullReport?id=19648&lang=en)
- [Mold Mission Area](http://moldmissionarea.weebly.com/)