Exterior

The church is constructed in sandstone with Welsh slate roofs. Its plan is cruciform, with a central tower over a crossing, a nave with a north chapel (the Kedleston Chapel), north and south transepts, a chancel with a clerestory, and a north vestry. The south doorway is Norman in style, having a round-headed arch decorated with a zigzag pattern, enclosing a tympanum with weathered carvings of beasts. To the right of the doorway are two two-light windows with flat arches. Each transept is buttressed and has a window consisting of three stepped lancets.

In the south wall of the chancel is a priest's door, with a lancet window on the left, and a two-light window under a flat arch to the right. In the clerestory are two-light windows in both the south and the north walls. The east wall has diagonal buttresses and a three-light window.^[2] Along the top is a parapet, in the centre of which is a sundial. This is inscribed with the words "We shall", and skulls and crossbones; on its summit are hourglasses. At the ends of the parapet are urn finials.^[6] In the north wall of the chancel is a two-light window, and the north wall of the vestry has two paired lancet windows. The Kedleston Chapel has three bays separated by buttresses. In each bay is a three-light window under which are three trefoils acting as ventilators.^[2]

Along the parapet is the inscription "QUIA MULTUM AMAVIT".^[6] The west wall has diagonal buttresses and a three-light window. Above this is a lancet window in the gable. The tower is in two stages. In the lower stage are two lancet windows, and in the upper stage are two-light bell openings on each side. The summit has a battlemented parapet, with crocketted pinnacles at the corners.^[2]

Interior

Between the nave and the Kedleston Chapel to its north is a three-bay arcade. There is an aumbry recess and a piscina in the chancel, and another piscina in the south transept. The north transept contains the organ. The font dates from the 18th century and consists of a circular bowl on a polygonal shaft; it has a wooden cover. The wooden pulpit is from the 19th century, and the brass lectern in the shape of an eagle dates from 1886. In the chancel are box pews.^[2] The altar is Jacobean in style.^[6] In the arcade is a wrought iron screen with gates. The church contains light fittings and a corona lucis, also in wrought iron, and five hatchments.^[2]

The stained glass in one of the windows in the chancel dates from the 17th century, and was moved into the church in 1910. The other stained glass dates from the late 19th and early 20th century.^[6] The two-manual organ was built in 1899 by W. Hill and Son of London, and rebuilt and enlarged by the same firm in 1910.^[8]

In the church are 35 monuments to the Curzon family; these include free-standing tombs, wall monuments and floor tablets.^[6] They date from the 13th to the 20th centuries.^[2] The largest is a free-standing tomb in the Kedleston Chapel. It bears the effigies of the 1st Marquess Curzon of Kedleston, who died in 1925, and his first wife Mary, for whom the chapel was built and who died in 1906 at the age of 36. It is a table tomb in white marble; two angels holding the crown of life lean over the effigies.^[6] The memorial was designed by Sir Bertram Mackennal.^[2]

In the south transept there is a tomb chest with the effigies of Sir John Curzon and his wife, dating from 1456. Sir John is dressed in armour, at the feet of the effigies are dogs, and on the sides of the tomb are the figures of their 17 children. Also in the transept is a plain slab decorated with a cross and foliage to the memory of Thomas de Curzon, who died in 1245. There are wall memorials to Sir John Curzon, 1st Baronet, who died in 1686, and his wife, Patience, who died in 1642 and to Sir John Curzon, 3rd Baronet who died unmarried in 1727.

There are more memorials in the north transept. One is designed by Peter Scheemakers to the memory of Sir Nathaniel Curzon, 2nd Baronet, who died in 1719, and his wife Sarah. A further memorial is to Sir Nathaniel Curzon, 4th Baronet and his family dated 1758, made by Michael Rysbrack to a design by Robert Adam.^[6]