The Order of St Patrick was restricted to 22 knights.
The insignia was particularly decorative: a sash riband was worn over the left shoulder, light blue in colour, with an oval pierced badge suspended from it.
This consisted of a shamrock with three crowns on its leaves (representing the kingdoms of England, Ireland and Scotland), the shamrock being placed on a cross of St Patrick.
The centre was surrounded by an oval which bore the legend QUIS SEPARABIT - who shall separate - and the date, MDCCLXXXIII.
The gold and enamel collar chain consisted of alternate roses and harps.
The breast star was of silver with a representation of the sash badge in the centre.
The badge and plume of the Irish Guards are based on the Order's star and light blue colour.
The Order was discontinued following the secession of the Irish Republic from the United Kingdom in 1922.
The last non-royal recipient was the 3rd Duke of Abercorn KG KP PC in 1922.
The last surviving recipient of the Patrick was His late Royal Highness The Prince Henry, Duke of Gloucester, who died in 1974.
The last appointment to the Order was for His Royal Highness The Prince Albert Frederick Arthur George, Duke of York (later GEORGE VI), conferred on St Patrick's Day, 1936.
The Rev Professor Peter Galloway, OBE, JP, has written a book about the Order, entitled The Most Illustrious Order: The Order of Saint Patrick and its Knights, by Unicorn Press.
As Professor Galloway concluded,
Perhaps a day may come when the Order of St Patrick could be revived but, until a new, appropriate and acceptable constituency can be discerned, this seems unlikely in the foreseeable future.