Interior
The church is entered by the south porch, which is paved in small red quarry tiles. There are 2 dissimilar mediaeval roof trusses, one perhaps from each of the 2 original porches. The purlins have run-out carved chamfer mouldings. Main door in a 2-centred arch.
The interior is dominated by its roof carpentry, the north nave in 10 bays and the south nave in 8, the trusses of both with braced collar beams and each roof slope with two purlins and cusped wind bracing. The naves are separated by an arcade of 5 arches on octagonal columns, imitating the earlier arcade but with more regularity of design. The floor is stone, mostly carpeted. The naves are pewed as one, with 3 banks of pews. Octagonal carved Gothic pulpit with iron handrail to the left of the chancel step in the north nave, and lectern to right, both by Nesfield.
There are 2 steps up to the chancel in the north nave, with a low wall each side. Two choir stalls each side, with rather formalised poppyheads at the ends of the men's stalls. Gothic floral motifs are shallowly indented in the brass Communion rails; there is no gate. The sanctuary floor is of red, white and black tiles with inset lozenge panels of encaustic tiles representing the 4 evangelists. The altar step is also in encaustic tiles, and there is a cladding of embossed arabesque green and blue tiles for the full width of the east wall (in the style of C16 Moorish cuenca tiles, as used elsewhere by Nesfield; probably manufactured by Maw & Co of Jackfield).
The south nave is closed at east by a Gothic vestry screen, with the organ at the left. Children's pews at the right. The font is C19 Gothic, octagonal, in yellow limestone, standing on a raised plinth at the west end.
The stained glass of the east window of the chancel is mediaeval, restored in the C19 and again recently, with the Crucifixion at centre; in its themes both the Apostles' Creed and the Seven Sacraments have been identified, though the other lights are more or less jumbled: Glynne (1847) noted the sentence 'venturus est judicare vivos ... '. The stained glass of the other windows dates from the C19 restoration. The window nearest to west in the north side features St Tyrnog, holding his church.
There are numerous wall monuments in marble or brass, including one with arms above a broken pediment, to Henry Powell of Glan-y-wern, 1749; another in Classical form with arms and an urn, to Edward Maddocks of Vron, armiger, 1758; another in Regency style to Richard Edmunds of Pentre-mawr, 1815. At west is a monument to Sir J Ashpool, 1722, classical with cornice and side scrolls, and one to John Ashpoole in the form of a lifted veil. Another in Regency style to Thomas Evans of Cotton Hall, 1831, with lamp. There is a large lozenge hatchment in the south nave.
A notice in the porch records a grant from the ICBS in 1876