St Nonna's Church, Altarnun

The oldest fabric dates back to the Norman era. Most of the church dates from the later part of the 15th century, at which time the north and south aisles were added. The church was restored in 1867 by E. Sedding.[4]

It is a building largely of the 15th century in the Perpendicular style, with a tower 109 ft (33 m) high. It is notable for the fine Norman font and the amount of old woodwork, including the screen, bench-ends and communion rails which date to 1684.

The screen is one of the finest 15th century examples in Cornwall; it has three gates and the cornice of vines and tracery and vaulting are finely carved.[5] The 79 bench-end carvings were executed by Robert Daye between 1510 and 1530 (Pevsner attributes them to 1524 or later) and portray a range of subjects including a Cornish piper and fiddler (Daye's name is given on one but the date is illegible).[6] Also, one of the damaged pew ends was repaired to its former glory by the late local master joiner Douglas Edwards in the 1980s.[7] Langdon (1896) records seven stone crosses in the parish, of which one is in the churchyard.

The church has a peal of eight bells.[8]

Associated with the church are five structures that are listed at Grade II. These are the northeast entrance to the churchyard,[9] the northwest entrance,[10] the gate, gatepiers, nearby wall and a mounting block at the southeast entrance,[11] and two items in the church yard; the Isbell tomb,[12] and a tombchest and headstone.[13]