Its exceptional size reflects the importance and standing of the borough of Grosmont at the time of the church's construction and has led it to be called a "miniature cathedral".

Cadw records that the scale of the "great cruciform church mark(ed) the important standing of Grosmont during the early medieval period.

[10] Cadw notes the tradition that the architect was French, employed by Eleanor of Provence but records that this "has no documentary basis".

[6] The architectural historian John Newman describes the font as "a strange piece, an octagonal bowl with a thick circular stem".

[6] In the transept is an unfinished memorial to a knight, dating from the late 13th or early 14th century, "a rare survival of great technical interest".