The nave was once almost four times longer and higher than the remaining portion, reaching as far as the extant arched memorial (located on this site to reflect the original length).

The Universe is represented by the Moon and Sun, which are painted with human features and laid in a bed of stars on the ceiling in the remaining Romanesque vault of the nave.

Christ is depicted perched on a throne above the Chancel, giving his blessing while being encircled by the traditional representations of the four Evangelists.

The Annunciation—with the Angel Gabriel bending down before Mary—and St. Christopher, the patron saint of the church, carrying Jesus across a ford with his staff in full bloom—are depicted in the paintings in the left-hand bay.

The primary painting on the north wall is a 15th-century depiction of Hell, with Leviathan (the sea monster) consuming the damned and a woman astride a lion heading towards him (a symbol of lust).