Arms of John Grey, 5th Baron Grey (c.1396-1430) of Codnor, on a ceiling boss in the South Porch of Canterbury Cathedral, built in 1422. The central group is royalty, the outer 4 clusters magnates
Heraldic bosses on ceiling of South Porch (1422), Canterbury Cathedral. King Henry V and his chief magnates, including Archbishop of Canterbury Chichele. Dating evidence concerning careers of persons represented by the heraldry suggests it was built in 1422 (Source: Willement, p.9). 1: The arms of King Henry V (1413-1422) in centre is surrounded by 8 shields including 5 royal princes and dukes. 2: Henry Chichele (c.1364-1443), Archbishop of Canterbury (1414-1443) Or, a chevron between three cinquefoils gules, impaled by the arms of the See of Canterbury. 3: Beauchamp quartering Newburgh (Richard de Beauchamp, 13th Earl of Warwick (1382–1439)) 4: Royal arms with a bordure argent (Humphrey of Lancaster, Duke of Gloucester (1390-1447) the youngest brother of Henry V, and the uncle of Henry VI). 5: Mortimer quartering de Burgh (Edmund Mortimer, 5th Earl of March (1391-1425), an important and loyal vassal of Henry V and Henry VI) 6: Royal arms with label of three points 7:Beaufort,: bordures compony argent and azure, the arms of Beaufort, legitimised progeny of John of Gaunt, 3rd surviving son of King Edward III: Royal arms of King Edward III within a bordure compony argent and azure. Maybe for Henry Beaufort, 2nd Earl of Somerset (1401–1418) and his younger brother and successor John Beaufort, 3rd Earl of Somerset (1404–1444). 8: Royal arms with a label of 5 points, the first 2 points ermine, the last three charged with fleurs-de-lys (John of Lancaster, 1st Duke of Bedford (1389-1435) the third son of King Henry IV, brother to Henry V, and acted as regent of France for his nephew Henry VI). 9: Beaufort: bordures compony argent and azure, the arms of Beaufort, legitimised progeny of John of Gaunt, 3rd surviving son of King Edward III: Royal arms of King Edward III within a bordure compony argent and azure. Maybe for Henry Beaufort, 2nd Earl of Somerset (1401–1418) and his younger brother and successor John Beaufort, 3rd Earl of Somerset (1404–1444). 10: Neville (Ralph de Neville, Earl of Westmorland (d.4 Henry VI)); 11: Stafford (Humphrey Stafford, Earl of Stafford (d.38 Henry VI)); 12: Sable fretty argent (Harrington) 13: Barry of six argent and azure (John Grey, 5th Baron Grey of Codnor (c.1396-1430 (d.9 Henry VI)) 14: de la Pole quartering Wingfield (William de la Pole, 1st Duke of Suffolk, KG (1396-1450), a favourite of King Henry VI). 15: Gules, semee of cross-crosslets a cinquefoil or (Sir Robert Umfraville, KG, (d.15 Henry VI)) 16: Plantagenet, a label of three points argent (John Mowbray, Duke of Norfolk) 17: Courtenay, (Huge de Courtenay, Earl of Devon (d.1423) 18: Criol 19: Azure, a cross argent 20: 21: Beauchamp, with crescent for difference (Richard de Beauchamp, Earl of Worcester (d.1431)); 22: Montagu quartering Monthermer; (Thomas de Montacute, Earl of Salisbury (d.1428) 23: Gules, on a chevron or three estoiles sable (Reginald Cobham, Lord Cobham of Sterborough (d.24 Henry VI)) 24: St Leger 25: Plantagenet with bordure argent 26: Hungerford 27: de Quincy / Ferrers of Groby 28: de Vere, (John de Vere, Earl of Oxford (d. 1 Edward IV)); 29: de Ros (John de Ros, Baron Ros of Hamlake, hereditary Chamberlain to the Archbishop of Canterbury) (Source: Willement, Thomas, Heraldic Notices of Canterbury Cathedral; with Genealogical and Topographical Notes, London, 1827, pp.9-14 [1]) Further reading: Messenger, Commander A.W.B., The Heraldry of Canterbury Cathedral. Volume I. The Great Cloister Vault, 1947.