It still bears the arms of archbishops Courtenay and Chicheley , believed to have been its benefactors .
In its final medieval form , the church was mainly a Perpendicular - style structure of late 14th and early 15th - century date .
church still bears the arms of archbishops Courtenay and Chicheley , believed to have been its benefactors .
In its final medieval form , the church was mainly a Perpendicular - style structure of late 14th and early 15th - century date .