---
title: "St Dwynwen, Llanddwyn Island"
description: "Located in Llanddwyn Island, Anglesey. Built Mainly early 16th century; earlier nave possible. Grade II. Medieval cruciform (ruin) style."
category: "Church"
tags: ["Church","Scheduled Ancient Monument (ruin)","Anglesey","Scheduled Ancient Monument","Llanddwyn Island","Grade II","Ruin","Cadw","Pilgrimage"]
canonical: "https://thebritishgazette.com/post/st-dwynwen-llanddwyn-island"
pubDate: "2026-09-06T02:05:39.496Z"
dateModified: "2026-09-07T20:34:01.711Z"
location: "Llanddwyn Island, Anglesey"
country: "Wales"
county: "Anglesey"
town: "Llanddwyn Island"
address: "St Dwynwen, Llanddwyn Island, Anglesey, LL61 6SG"
postcode: "LL61 6SG"
built: "Mainly early 16th century; earlier nave possible"
denomination: "Scheduled Ancient Monument (ruin)"
dedications: ["Dwynwen"]
grade: "II"
style: "Medieval cruciform (ruin)"
materials: "Rubble with brown sandstone dressings"
website: "http://www.countryfile.com/days-out/llanddwyn-island-anglesey"
openingHours: "Always accessible."
listEntryUrl: "https://cadwpublic-api.azurewebsites.net/reports/listedbuilding/FullReport?id=5446"
gridReference: "SH 386 627"
accessNotes: "Ruins on Llanddwyn Island, reached by a tidal causeway from Newborough Warren; access depends on tides and weather. Always accessible when the island can be reached."
---

# St Dwynwen, Llanddwyn Island

The ruined church of St Dwynwen stands in a hollow at the centre of Llanddwyn Island (Ynys Llanddwyn), Anglesey, a Grade II listed building and scheduled monument on a former pilgrimage site dedicated to the Welsh patroness of lovers.

## Overview

Cadw lists the Church of St Dwynwen at Grade II (reference 5446), designated 5 February 1952. The remains are mainly early sixteenth-century: a cruciform plan of which foundations and parts of the south-east transept and the south-west corner of the nave survive, built of rubble with brown sandstone dressings. The south-east transept walls are the most complete, the south-east wall still standing above window height. RCAHMW noted that the chancel appears early sixteenth-century, the transepts probably contemporary, and the nave lower courses possibly earlier; the church was a prebend of Bangor Cathedral. It is also scheduled as AN046.

Archaeological work ahead of Cadw conservation found a multi-phase building, probably late twelfth- or early thirteenth-century in origin, unusually orientated north-east–south-west, in a formerly circular churchyard. A mid-eighteenth-century engraving already shows the church roofless. Llanddwyn was a wealthy pilgrimage church in the later Middle Ages; in 1535 offerings to the saint far exceeded the parish tithes. The island is reached across sands from Newborough at low tide.

## Further Information

- [Cadw listed building report 5446](https://cadwpublic-api.azurewebsites.net/reports/listedbuilding/FullReport?id=5446)
- [Coflein: St Dwynwen’s Church](https://coflein.gov.uk/en/site/27548)