Architectural Features
Restored chancel retains C12 ashlar clasping buttresses and a small Gothic priest's door to south, but has a 5-light east window and 2- and 3-light side windows in C19 Geometrical-Decorated style
The aisle to north formerly incorporated a priest's dwelling, and has 2 square-headed C15 windows facing east, both with cinquefoil lights and labels, one originally serving an upper floor
a C15 stair with 3-centre arched entrance projects at the north-east-angle
The north transept retains fragments of a C12 chevron string course, interrupted by a large 4-centre-arched 5-light window with Perpendicular drop tracery and a deep casement mould
A later extension to west has a restored 2-light window with reticulated tracery plus the outline of an arched opening, and is continued westwards by the narrower early-C14 north aisle which retains two 2-light C14 windows to north plus a later large single-light window to west
The C14 porch has an entrance arch with wave mouldings, and shelters the north door with earlier C14 mouldings
The south transept also has remains of the C12 chevron string plus a large restored Perpendicular window
it was extended eastwards, probably in the C15, but now has a C19 east window similar to those in the chancel
Above the door are fragments of carved stonework, probably from tombs in the demolished church of Bicester Priory
The west wall contains a 3-light C16 window with uncusped heads and a label
The C16 clerestory has 4 arched windows to north and 4 square-headed windows to south, all with 2 uncusped 4-centre-arched lights
Over the crossing is a large square-headed C15 window, facing south, with 4 cinquefoil lights within a deep casement moulding
bell chamber stage has 2-light arched openings with Perpendicular tracery and transoms, but the panelled and crocketed pinnacles are probably C17/C18
Interior: chancel is entirely C19 except for the wide archway to north, of 3 chamfered orders, which is probably early C14
they are probably C11 and formed part of a pseudo-cruciform arrangement with narrower flanking "wings" or transepts but not necessarily with a fourth arch to west
The 4-bay south arcade of c.1200 (which must post-date the demolition of a fourth crossing arch) has pointed arches with deep angle rolls, probably later reinforced by the inner chamfered orders and partly rebuilt, and set on late-C14 clustered columns set diagonally, one with the remains of crocketed canopy work
Further salvaged panels of carved stonework are set in the spandrels
The-arch from the south transept to the aisle is completely C14 except for re-used Transitional capitals with square abaci and stiff-leaf foliage
the outer spandrels of the arcade retain sections of the C12 chevron band, formerly external
the nave roof, which looks C16 but is noted as renewed 1803, has large cambered tiebeams with pierced panelled infill to the trusses and to the spandrels of the curved braces
Small window over the priest's door said to contain C14 glass
remainder of stained glass (mainly chancel and south aisle) is C19, including a window of 1866 by Morris and Co. with panels by Burne-Jones and Webb, one of 1853 by O'Connor and 2 by Mayer and Co. of Munich
a monument to Sir Edward Page Turner (died 1766) by Joseph Wilton has a big urn and portrait medallions
one of the many monuments to the Cokers of Bicester House is a relief of c.1794 by Sir Richard Westmacott. (V.C.H.: Oxfordshire, Vol.VI, pp.46-7