Church of St Tetta is a Grade II* listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 17 January 1963. A Medieval Church.

Church of St Tetta

WRENN ID
riven-corridor-gorse
Grade
II*
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
17 January 1963
Type
Church
Period
Medieval
Address
Church of St Tetta, Llanddetti, Talybont-On-Usk, Powys
OS grid reference
SO 128 202
Coordinates
51.87383, -3.26793
Source
Cadw listing

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

Description

The Church of St Tetta is a small church built of sandstone rubble with some ashlar dressings and a stone tile roof. Its layout consists of a south porch, a continuous nave, and a chancel, with a bellcote at the west end. The gabled south porch features an apex at wallplate level and slightly swept eaves, showing signs of alteration, and has large quoins and a plain south doorway. The south nave has three rectangular windows, each with two trefoil-headed lights and hollow chamfered mullions. There is also a moulded four-centred arched priests' doorway with a battened and studded door. The battered east end displays a window with Perpendicular tracery in three lights, while the north side has rectangular two-light chamfered mullioned windows with plain arched heads. The west end contains a blocked west door, and the bellcote, made of ashlar and dressed stone, houses two bells.

The church is situated in a large, mostly unenclosed churchyard filled with a variety of tombstones, the oldest of which can be found to the east. Inside the south porch, there are small side lights with wide splays and shallow side benches with wooden seats. The floor is laid with large flags, including some tomb slabs. The roof features five collared rafters and shows signs of a former ceiling. The Tudor arched south doorway has a hollow-chamfered head and jambs, with a door that includes studs, long strap hinges, and moulded battens and frame, ledged at the back.

The interior has a repaired or replaced wagon roof with plastered panels, and on the north wall opposite the door, there is a large 18th-century wall painting of the contemporary Royal Arms. The windows have wide segmental arched splays, and the floor throughout, including the sanctuary, is covered with flags, tomb slabs, and ledgers, including three 17th-century ledgers, two of which feature floriated cross heads and coats of arms. A ledge in the west wall may have supported a post-medieval gallery. The font is bowl-shaped with an octagonal stem that is broached to a square chamfered base. Near the priests' door, there is an Early Christian inscribed stone that appears to be part of a cross shaft.

Local climate

Church of St Tetta sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.

It experiences an average of 57 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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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Nearby listed buildings

  1. Obelisk monument S of St Tetta's church Grade II 7 m
  2. Group of 5 chest tombs S of St Tetta's church Grade II 15 m
  3. Group of 3 chest tombs E of St Tetta's church Grade II 16 m
  4. Dan-y-graig Bridge (Canal Bridge No.137) Grade II 434 m
  5. Llanddetti Bridge (Canal Bridge No.139) Grade II 447 m
  6. Llanddetty Hall Farmhouse Grade II 465 m
  7. Llanddetty Hall barn and attached ranges Grade II 492 m
  8. Wenallt Lower Bridge (Canal Bridge No.140) Grade II 715 m
  9. Workhouse Bridge (Canal Bridge No 136) Grade II 727 m
  10. Workhouse Bridge (Canal Bridge No.136) Grade II 728 m