[1] There is evidence in the Book of Llandaff of an earlier 8th century Celtic church at Aper Menei, which is interpreted to be Monmouth, and it has been tentatively suggested that this may have been on the site of the later priory.

[2] The priory was granted to the Abbey of St Florent at Saumur, and was consecrated in the presence of William fitzBaderon[3] in 1101.

"[6] His original intention was complete demolition and rebuilding, but the estimated cost of £22,000 was too high and he was limited to reconstruction, in which the tower and the steeple were retained.

[7] The church is the tallest building in Monmouth, with the gilded cockerel weather vane some 205 ft (62 m) above the ground.

The Lady Chapel contains an English Altar with four riddel posts each with an unusual brass base and wrought iron capital supporting a newly gilded angel.

The screen features the ironwork and woodwork of Letheren and Martin (the latter of whom made the Speaker's Chair in the House of Commons and the pulpit of St Paul's Cathedral).

The window was donated by Charles Henry Crompton-Roberts, of Drybridge House, a local business man and landowner who was a substantial benefactor to the town.

The reredos, a large altar painting entitled The Adoration of the Magi, is by James Watney Wilson, RA, and dates from 1888.

Many were made in Malvern, but recent excavation on Monk Street has uncovered the kiln in which a number of the earlier examples were fired locally.

The font is of carved Portland stone and green Genoa marble and was installed in the present position in 1982.

Writer and cleric Lionel Fanthorpe has suggested that his intention may have been to confuse the Devil, so ensuring Renie his passage to heaven.

Remains of the monastic foundation are sited on the adjacent Priory Street, including the Prior's Lodging, with a fine fifteenth century oriel window,[6] often mistakenly thought to have a connection with Geoffrey of Monmouth.

Residents in neighbouring Whitecross Street suffered a high mortality rate as a result and unpleasant odours from the churchyard were also evident.