[1] The church at Apethorpe dates mostly from the 14th or 15th century, although there may have been an earlier structure on the site.

[1] The Grade I listing is for buildings "of exceptional interest, sometimes considered to be internationally important".

[3] The church is constructed of coursed limestone with ashlar dressings; the roofs are lead.

The chancel contains a carved corbel and the pulpit and baptismal font, which date from the 18th century.

[1] The south chapel contains a large marble monument to Sir Anthony Mildmay (d. 1617)[4] and his wife Lady Grace Mildmay (d. 1620), an effigy to Sir Richard Dalton (d. 1442) and a 19th-century marble monument to John Arthur Fane, the infant son of Lord Burghersh.