Church of St Iestyn is a Grade II* listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 30 January 1968. A Medieval Church.

Church of St Iestyn

WRENN ID
over-soffit-wind
Grade
II*
Local Planning Authority
Isle of Anglesey
Constituency
Ynys Môn MP: Llinos Medi (PC)
Country
Wales
Date first listed
30 January 1968
Type
Church
Period
Medieval
Address
Church of St Iestyn, Llaniestyn, Llanddona
OS grid reference
SH 584 795
Coordinates
53.29437, -4.12449
Source
Cadw listing

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

Description

The Church of St Iestyn is a simple rural church comprising a structurally undivided nave and chancel, with a south transept and porch. The church was built using roughly coursed rubble masonry, with the west gable wall rendered. It has a slate roof with stone copings and cross gable finials, and a west gable bellcote.

Entry is through the south porch, which features a 15th-century truss as bargeboards, bearing floriate decoration in relief. The south doorway, dating from around 1500, has a round head within a square frame, with moulded jambs and sinkings in the spandrels. A blocked Norman doorway remains in the west gable. The east window, dating from the 15th century, is of three cinquefoil-headed lights in a pointed arched frame with a hoodmould. A 19th-century rectangular leaded light is set in the north nave window. The south transept has a restored east window, also a rectangular leaded light, with reused 14th-century dressings. Its south window is of three stepped trefoil-headed lights in a restored frame with a 16th-century rear arch.

The nave and chancel are structurally undivided, and have an exposed roof of four bays. This includes two pegged and collared trusses, probably dating from the 15th century. The easternmost truss is a late 19th-century chamfered, collared truss, the south blade of which rests on a massive hewn beam across the entrance to the south transept. Two pegged and collared trusses are also present in the south transept. The sanctuary is raised one step and has a repaired 17th-century chamfered rail with shaped balusters and square newel posts surmounted by globe finials. A slate tablet on the north wall of the chancel from the 18th century records benefactions to the poor of the parish. Reset on the west wall of the south transept is a 14th-century effigy stone of St Iestyn, carved in low relief depicting a bearded man dressed as a hermit with a cloak fastened by a broach and a hood. He holds a staff in his right hand and a scroll with an inscription in his left. The background is diapered with four-leaved flowers, and an inscription in debased Lombardic lettering reads "H[I]C : JACET : SANGTUS : YESTINVS : CVI : /WEN[LLIA]N [F : MADO] C : ET : GRVFFVT : AP : GWILYM : O[BT]VLIT : IN OB/LACOEM : ISTAM : IMAGIN/NE : P : SALVTE : ANIMARVM : S."

A 12th-century font is located at the west end of the nave. It has an ovoid bowl with the outer surface carved and divided into three bands: the middle band consists of a row of chevrons with truncated ends; the lower band contains a series of crude round-headed arches; the upper band contains an equal armed cross with expanded ends, a straight-sided spiral, two circles, an interlaced cross, and a panel of chequerwork. To the east of the south doorway is a plain, tapered hexagonal water stoup.

Local climate

Church of St Iestyn 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 90% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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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