1. Holy Trinity Chruch is situated in the village of Mydroilyn, Llanarth bounded by the B4342 to the North and the Cae Gwen to the East. The original church was erected in 1890, as a chapel of ease to St David's (then St Vylltyg's) Church (NPRN 419305). It was constructed of corrugated iron, lined with wood, and had 150 sittings.

The church was rebuilt in 1991, to the designs of Andrew Davies. The style of this church has been described as minimal gothic.

Sources include :
Lloyd, T, Orbach, J and Scourfield, R, 2006, The Buildings of Wales: Carmarthenshire and Ceredigion

K Briscoe, RCAHMW, 4TH September 2013

2. Holy Trinity church is located on the south side of the B4342 at the cross-roads in the village. It was built in 1991 to a minimally Gothic design by Andrew Davies, replacing a corrugated iron church of 1890 and built on much the same plan. It consists of nave and chancel, bellcote, gabled north-east vestry and gabled porch on the west end-wall. Walls are whitewashed under slate roofs, simple narrow windows with pointed arches.

Sources:
https://www.flickr.com/photos/llwyngwair/113293156/ (image).
T.Lloyd, J.Orbach & R.Scourfield, Buildings of Wales: Carmarthenshire and Ceredigion (2006), p.543.
Ordnance Survey Counrty Series 25-inch mapping: sheet Cardiganshire XXIV.16, second edition of 1905.

David Leighton, RCAHMW, 16 July 2015