The chancel’s east window, once an elegant three-light opening, lost its delicate stone tracery sometime in the late 19th century, though early accounts from around 1870 still describe it intact. What remains today is the window’s ornate exterior frame, crowned by a moulded hood-mould that curves gracefully above the opening, its ends terminating in carved stylised vine leaves; a decorative touch that speaks to the skill of medieval stonemasons.

The most intriguing element of this window’s design is what once sat at its apex. The hood-mould’s keystone, now preserved at the local parish priest’s house, features a carved mitred figure, likely representing a bishop or abbot who once held authority here. Above the window itself, visitors can still see the empty framed niche where this ecclesiastical sculpture originally stood, watching over the priory grounds. This arrangement of architectural elements; window, hood-mould, keystone, and niche; would have created an impressive vertical composition on the chancel’s eastern wall, drawing the eye upward in typical Gothic fashion.

Elsewhere in the area, particularly around Rathmullan and nearby Ballyboe, stone heads and carved figures appear as recurring motifs in the medieval architecture. These sculptural elements, whether religious or secular in nature, offer glimpses into the artistic traditions that flourished in this corner of Donegal during the medieval period. Each carved face and decorated stone serves as a tangible link to the craftspeople who shaped them and the communities that commissioned them, transforming simple building materials into expressions of faith, power, and artistic achievement.