[3] It is dedicated to St Adwen, one of the daughters of King Brychan of Brycheiniog.

The north transept and the west tower date from the 13th century.

The work was executed by Westlake, Hooper and Worden of Camelford.

The ecclesiastical parish is the responsibility of the Rector of Lanteglos-by-Camelford, and Advent has been associated with Lanteglos since medieval times.

The church is in a joint benefice with: The church contains monuments to Elizabeth Bennet (died 1643, dated 1667), John Batten (died 1710), and Edward Dinham of Newton, St Kew (died 1831), as well as a carved granite stone to William Michel (died 1650), his wife Agnis (1685), and their children Elizabeth, Anne, Margery and Grace.