Rubble and ashlar limestone, lead and tile roofs.
Nave: C12 south aisle has large quoins and pebble-work to lower courses
C12 south doorway within has a lightly-chamfered, two-order round arch having single order of columns with plain capitals
two-light window to bay two has pointed arch and hoodmould with carved-head stops
end walls each have a small C12 window.
Rokeby Chapel (to north) built soon after 1521: Perpendicular with cyma-moulded plinth and moulded band.
heraldic shield beneath hollow string course carved with animals
Interior: late C12 aisle arcades with half-round responds
round-headed piscina in south aisle and complete embrasures to the C12 end windows
main shafts with tiny figures in niches at the capitals
canopy has carved vinetrail and pierced cresting.
Monuments in Rokeby Chapel: floor slabs include that to Thomas Rokeby Large marble wall monument on east wall to Thomas Rokeby has consoles with floral drops and cherubs head flanking a domed oval plaque with Latin inscription, cartouche over and open segmental pediment containing cartouche and mantling beneath draped urn.
some inscribed brasses within.
To its left a weathered C17 cartouche above marble plaque.
On south wall a scrolled pedimented monument to William Rokeby has shield of arms over.
Brasses: on east wall a plate with eight lines of verse which originally marked the burial spot of Archbishop Rokeby.
Other brasses on floor to Thomas Boucher and wife Elizabeth Stained glass: western north chapel window has jumbled C16 glass with incomplete figures of saints.
PM 821 (description and inventory).
P. F. Ryder, Saxon churches in South Yorkshire, County Archaeology Monograph No. 2, 1982 page 94 (plan).