St Tydfil's Church

St Tydfil's Church is designed in the Burgundian Romanesque style and features a plan that includes an apsidal chancel, an aisled nave without a clerestory, transept chapels, a tall west tower, a south porch, and northeast vestries along with a priest’s room.

The exterior showcases pale freestone dressings with bull-nosed facings and slate roofs, adorned with crucifix finials. Notable architectural details include an arcaded corbel-table, window heads with chevron patterns, and a roll-moulded sill band. The transept gables have oculi, with the south side featuring traceried designs, and linked hoodmoulds are present over the nave. The gabled south porch displays a billet cornice, Transitional-style blind arcading, and a foliage band over the arch with nook shafts. The inner opening has boarded doors beneath a blind tympanum. The plain parapet above the clock faces and linked bell-openings leads to a four-stage unbuttressed west tower, which has a circular stair turret at the northwest angle. Banded quoins, impost bands, and tall blind arches from the Georgian lower stages are still visible.

Inside, the church has a fine colourwashed interior with a groin-vaulted chancel and flanking chapels. The nave is divided into four bays with diaphragm arches supporting a flat ceiling, while pointed transverse arches lead to aisles featuring groin vaults.

Furnishings include a medieval octagonal font located under the tower, a round, panelled pulpit designed by Pearson, a pelican lectern, and notable neo-classical wall monuments from the earlier church. Additionally, there are two Early Christian carved stones against the north wall; one is the famous ring-cross, an incised pillar stone of ARTBEU, and the other is the ANNICIUS stone.