The Sacred Military Constantinian Order of St. George is believed to be the most ancient of the Catholic Orders of Chivalry. The Order is under the royal protection of The Royal House of Bourbon - Two Sicilies, in fact it is the only international Catholic Order with an hereditary Grand Mastership. Although it is under the protection of a Royal House and its membership includes many distinguised Nobles, Princes of the Church, national leaders and Catholic elite, the Order is not about honours and decorations. It has always been, a call to religious service in a Roman Catholic chivalric sodality dedicated to propaganda of the Faith, Defense of the Church and support of the Holy See. Early in its history the Constantinian Order received confirmation as a Religious-Militay Order from the Holy See, with the Sovereign Military Hospitaller Order of St. John of Jerusalem, of Rhodes and of Malta, is the only international Catholic Order which has maintained this unique status unchanged to the present day. Membership is both a privilege and a profound responsibility. It is a solem, lifetime commitment that cannot be undertaken without deep reflection.
(designed by Baron H. Pinoteau)
The Sacred Military Constantinian Order of Saint George is an Order of Chivalry which, from its earliest origins, has supported the glorification of the Cross, the propaganda of the Faith and the defense of the Holy Roman Church, its special legacy through service in the Orient fighting the infidel and the many proofs of the recognition and regard of the Supreme Pontiffs.
It is not only required that the Knights should lead the lives of perfect Christians but that they must participate in every manifestation which contributes to the development of the principles of religion among people and co-operate with all who revive the practice of Christianity.
The Order, to strengthen its secular institution, must be willing to adapt to the exigencies of the times which, while evolving, have transformed the structure of modern society, and must dedicate itself to the two greatest and most important social works, hospital assistance and charity.
The Cross of the Sacred Military Constantinian Order of Saint George is gold, flory, enameled in purple; of greek form, inscribed on the four arms with the letters I H S V (In Hoc Signo Vinces) and in the centre has the monogram PX with greek letters Alpha and Omega either side.
The ribbon of the Order is watered sky-blue silk.

Bailiff Grand Cross of Justice
Knight of Justice - SMOM
Gentleman of His Holiness
President of the North American Association of the Constantinian Knights; Member-Councilor of The Deputation
The Badge of the Constantinian Order can be seen in the upper right hand corner of Fra' Macpherson's bookplate.
His Excellency Dr. Robert Gerald Guest
Knight of Merit with Star
Knight Commander with Star - Order of the Holy Sepulchre
[Lieutenant - Lieutenancy of Canada - Toronto, Order of the Holy Sepulchre]
(grant of arms from the Canadian Heraldic Authority)
Knight of Merit
Knight - Equestrian Order of the Holy Sepulchre of Jerusalem
Cross of Metit of the Holy Sepulchre of Jerusalem
Magistral Delegate- Atlantic Canada Delegation - Order of the Holy Sepulchre
Suspended below the Shield of Arms is the insignia of a Knight of Merit of the Constantinian Order. This is the only example, that I have found, suspending the insignia of the Sacred Military Constantinian Order of St. George from Arms granted to a Canadian. These Arms were granted by the Canadian Heraldic Authority on April 23, 1996.
Knight of Merit
Magisral Knight in Obedience - SMOM
Knight Commander - Equestrian Order of the Holy Sepulchre
Officer of the Most Venerable Order of St. John
Knight of Merit
Member of the Order of Canada
Commander of the Most Venerable Order of St. John
Knight of Magistral Grace - SMOM
Dr Jorge Raul da Silva Preto OIH, KCN, KHS
From 1968 to 1973 Dr. Preto was first Secretary to the Portuguese Embassy in Ottawa and Charge d'Affaires a.i. of Portugal to Canada
Knight Grand Cross of Justice
Knight of Justice - Most Venerable Order of St. John
Vice-Grand Chancellor and Delegate of the Grand Master
As Cardinal Patron of the North American Association His Eminence is Spiritual Leader and Sheppard to the Canadian members of the Sacred Military Constantinian Order of St. George
CONSTANTINIAN ORDER OF SAINT GEORGE (Guy Stair Sainty)
CHIVALRIC ORDERS (Guy Stair Sainty)
THE TWO SICILIES SUCCESSION DISPUTE (Guy Stair Sainty)