On December 8, 2019 His Holiness Pope Francis appointed Fernando Cardinal Filoni as the VIII Grand Master of the Equestrian Order of the Holy Sepulchre of Jerusalem. With that his predecessor, Edwin Cardinal O’Brien became Grand Master Emeritus of the Order.
Heraldic use in the EOHS is somewhat unclear. There are various sources all claiming to be definitive accounts of the heraldic privileges of the Order but, in fact, since most only exist online none can truly be said to be definitive.
Since 1949 when Cardinals of the Holy Roman Church have been appointed by the Pope as Grand Masters they have observed the heraldic convention, like other orders, of marshaling their personal arms to those of the Order by means of quartering them. No one has disputed their right to do so or that this has been the usual manner. There remains a question, however, of whether or not to marshal the armorial bearings of Grand Masters Emeriti in the same way, or, as the usual heraldic custom would suggest, to have them revert to using their personal arms alone.
Cardinal O’Brien’s coat of arms is of particular interest in this question because of his unfortunate and erroneous habit of retaining armorial elements from his previous postings in his coat of arms each time he has been assigned to undertake a new position. So, the arms he assumed when first ordained Auxiliary Bishop of New York have long ago been abandoned. After he concluded his tenure as Archbishop of of the Military Archdiocese, USA he kept the open globe from the archdiocesan achievement of the US Military and incorporated it as a base into his personal arms when he moved to Baltimore. In an even worse move, when he left Baltimore as its archbishop to go to Rome as Pro-Grand Master and later Grand Master of the EOHS he kept his coat of arms entirely as they had been in Baltimore, impaled with the arms of the See of Baltimore, for which he had absolutely no right whatsoever as he was no longer the Ordinary of that archdiocese. It is important to remember that the custom of bishops impaling their personal arms with those of their See does not mean that the arms of the jurisdiction becomes a part of their own coat of arms. Rather, it is a means of marshaling, that is to say, depicting two separate coats of arms on the same shield to illustrate a relationship between the two, in the case of bishops to indicate that they are “married” to their diocese and exercise jurisdiction over it. If they should leave that diocese they no longer enjoy that right.
So, we see that the arms of the See of Baltimore never should have been included in Cardinal O’Brien’s arms as Grand Master of the EOHS. In the case of the globe from the arms of the US Military Archdiocese at least it can be said that rather than marshaling his arms to those of the Military Archdiocese what O’Brien did was to borrow a charge and incorporate it into his own personal arms which is arguably a better practice and, thus, acceptable.
There are probably those who assume it is acceptable for the cardinal simply to continue using the same achievement he used as Grand Master. They would be wrong. No one in an emeritus position is entitled to heraldically represent jurisdiction they no longer exercise. I have seen some sources that would claim a Grand Master Emeritus, indeed any cleric, may quarter his personal arms with those of the Order. I believe this is false. The convention has always been that quartering the personal arms with those of the Order is the prerogative of the Grand Master alone. I have seen no definitive official source that allows for any cleric to quarter their arms with the arms of the Order.
Accordingly, and logically, the only other recourse would be for Cardinal O’Brien to bear his personal arms alone like other members of the College of Cardinals who have retired; to exclude the arms of the See of Baltimore over which he ceased to have any jurisdiction long ago; to retain the globe from the arms of the See of the US Military as it is now a charge incorporated into his personal arms; to indicate his continued membership in the EOHS by means of placing the cross of the Order (the Jerusalem cross) behind the shield. This, unfortunately, leaves him with a rather unfortunate personal armorial achievement. (below)
There is a good argument to be made for one other possibility. Certain officials of the Order and members of a particular rank within the Order, namely Knights & Dames of the Collar; Lieutenants; Members of the Grand Magistry and Grand Priors, impale their arms with the arms of the Order. It can be argued that the Grand Master Emeritus is both a Knight of the Collar and, honorarily at least, still considered a Member of the Grand Magistry. By that logic a Grand Master Emeritus might impale his personal arms with those of the Order rather than quarter them and this would leave Cardinal O’Brien with an achievement that looks a bit less empty. (below)