The instrument itself is mainly 19th century;[3] however, its elaborate wooden case is very early.

[7] In the 15th century, a new stained glass window was installed in the church featuring Saint Catherine.

Also installed in the church at the time were symbols relating to King Edward IV of England including the White Rose of York and the Black Bull of the Duke of Clarence.

New choir stalls were installed and a new roof was fitted over the nave with Tudor Roses.

[4] The future composer and organist of Hereford and Antwerp Cathedrals, John Bull may have been brought up in Old Radnor, in which case he would have learned to play the organ at St Stephen's Church.

[13] As a result of the decision in the referendum, St Stephen's Church remained a part of the Diocese of Hereford.