St Tysilio's church is situated near end of a lane, east of Cae'r-llan farm. It was built in 1825 on the site of an earlier church, by Elias Davies and Henry Parry, and restored in 1890 by David Davies of Penrhiwllan. It is constructed of rubble walls (retaining older battered foundations to nave north), slate sills and stone voussoirs, and slate roofs with overhanging eaves. It consists of a plain whitewashed nave with lower and narrower chancel, pointed doorway in west gable wall and pointed window openings. The west bellcote and cheap wooden tracery window frames came from the 1890 restoration.
Inside, the arch-braced roof of low pitch with king-posts dates from 1890; the boarded and ribbed wagon roof to the chancel is of similar date.
The chancel arch is plain and wide, extending beyond the chancel wall to the south. To the north-west of the nave is a screened late nineteenth-century vestry. The octagonal ashlar font is probably of fifteenth century date. A twelfth-century font at St Llawddog's Cenarth (NPRN 309895) is said to come from here. Pulpit and chancel fittings are of twentieth-century date.

Sources:
Extracts from Cadw Listing description.
T.Lloyd, J.Orbach & R.Scourfield, Buildings of Wales: Carmarthenshire and Ceredigion (2006), p.508.
RCAHMW Carmarthenshire Inventory, no.60, pp13-14)

D.Leighton & C.H.Nicholas, RCAHMW, 14 July 2015