The church was founded by Bleddrws in the second quarter of the 12thC, when it was referred to as a 'monasterium', perhaps indicating some monastic link.
The current building dates from 1863-5.
The timber bell frame and supports (perhaps of the 17thC) were retained from the earlier church, as was a 15thC bell. But otherwise none of the early furnishings and fittings have been preserved. The building is set in a large, low-lying, sub-rectangular churchyard, with memorials from the late 18thC.
Clwyd-Powys Archaeological Trust - Montgomeryshire churches survey
Link
Coflein details
Link (includes images from internal excavation with larger versions linked in Archive section).
See other images of Church of St Michael, Trefeglwys