Church of St Michael

The nave has a 4-bay arched-brace roof incorporating medieval timber. Beyond the simple plastered chancel arch the chancel has a 3-bay collar-beam roof with cusped raking struts and principals on corbels. The S side of the sanctuary has a C14 cinquefoiled tomb recess with a broken effigy of a woman of late C13 or early C14, traditionally said to be the wife of Dafydd ap Gruffydd, brother of Llewelyn Fawr. A 2-bay N chancel arcade, of 1894-5, has an octagonal pier and 2 orders of chamfer. A lower and narrower arch is further L in the nave. The N aisle has a restored late medieval 8½-bay arched-brace roof, on the S side resting on late C19 stone corbels. The SW vestry has a pointed doorway, which was the main entrance to the church before the W porch was added.

In early C20 reorganisation of the interior the chancel is effectively now only the 2 E bays, including the sanctuary in the E bay, and is separated from what is in ritual terms the nave by a low panelled screen. It incorporates panels re-used from family pews, including 2 inscribed 'WHM 1682', and another 'HG 1684', as well as vine trails and a quatrefoil frieze re-used from the cornice of the late-medieval chancel roof and noted by Sir Stephen Glynne c1839. The polygonal pulpit is an integral part of the dado and also incorporates re-used woodwork. The octagonal font has disc ornament to the facets, the E of which is inscribed '1661 INIR', and has an iron-bound cover. It is in the N aisle against the W tower wall where fragments of C14 sepulchral slabs were set up in 1904. The N aisle has 2 Decalogue boards and a Royal Arms of George I. The chancel reredos, a 1914-18 memorial, has canopied niches with figures of saints, in late medieval style.

Many windows have stained glass. In the chancel the E window of 1908 shows the Crucifixion and is by Joseph Bell & Son of Bristol. The SE window has medieval fragments; the middle window in the S wall is a war memorial with SS David and George and the SW window depicts Mary and Elizabeth, dated 1936 by Henry Dearle of Morris & Co of London. In the N aisle the E window shows the Ascension, of c1923, while the N window shows the presentation of Jesus at the Temple, of c1920. In the nave the S window shows the Annunciation, c1936. The W window, by Celtic Studios of Swansea of 1959, depicts the presentation of the royal decree to hold an Eisteddfod at Caerwys in 1523.

There are also numerous memorial tablets. The chief are a pair of contemporary classical wall tablets on the nave S wall. Both have slate inscription panels to freestone tablets with cherubs at the base. The tablet on the W side has a broken segmental pediment with cartouche and commemorates Thomas Lewis (d 1751), while the tablet on the E side has an open pediment and commemorates Samuel Mostyn (d 1751).

A mixed but mainly Perpendicular and Tudor-Gothic style church. The nave and slightly narrower 3-bay chancel are of equal length and are under a single roof. In addition there is a SW vestry, W porch, and a N aisle under a separate roof with the tower at its W end. Of rubble-stone walls with yellow freestone dressings, and slate roof behind coped gables. The nave has a single C14 2-light S window with cusped lights, while the SW vestry has a 2-light Perpendicular S window. The chancel roof has crested ridge tiles to its 2 E bays only (reflecting the internal shortening of the chancel in the early C20). It has 2 hooded 2-light square-headed windows with sunk spandrels, with a 2-light Perpendicular window further R, all partly renewed. Beneath the R-hand window is a stone tablet with Latin inscription commemorating Robert Evans of Caerwys (d 1582). The SE angle has a diagonal buttress. The 5-light late C19 Perpendicular E window has arched tracery lights, and a hood mould. A stepped buttress is between chancel and N aisle, with diagonal buttress to the NE angle. The N aisle has a Perpendicular 5-light E window under a 4-centred head with cinquefoiled lights. Beneath the window are concrete steps to the boiler room. On the N side is a 2-light square-headed window at the E end, which has cusped lights, while in the centre is a renewed similar 2-light window but with arched lights, both windows having sunk spandrels. At the W end is a pointed doorway with boarded door enriched by studs and with original handle and escutcheon, inscribed 'TP RW 1780'. On the E side of the tower is the creasing of the earlier N aisle roof, of steeper pitch.

The 4-stage unbuttressed tower is battered at the base, and is of rubble stone with bigger dressed quoins. The lower 2 stages have narrow slits in the W and N faces. The third stage has, in each face, a C17 2-light window with sunk spandrels and cusped lights. The C17 upper stage is slightly narrower, and is above a thin band. The W and E faces have round clock faces of 1913, above which are the 2-light belfry windows with sunk spandrels and louvres, and the embattled parapet. The W window of the nave, above the porch, is a 2-light Perpendicular window of C19 form. The porch has a moulded lintel and double iron gates. Inside, the W door to the nave has a Tudor arch and boarded door with strap hinges.