 The Chapel of the Order was originally in St Patrick 's Cathedral in central Dublin . Each member of the Order , including the Sovereign , was allotted a stall in the choir of the Chapel , above which his ( or her , in the case of Queen Victoria ) heraldic devices were displayed . Perched on the pinnacle of a knight 's stall was a helm , decorated with mantling and topped by his crest . Above the crest , the knight 's heraldic banner was hung , emblazoned with his coat of arms . At a considerably smaller scale , to the back of the stall was affixed a piece of brass ( a " stall plate " ) displaying its occupant 's name , arms and date of admission into the Order . Upon the death of a Knight , the banner and crest were taken down and replaced with those of his successor . After the disestablishment of the Church of Ireland in 1871 , the Chapel ceased to be used ; the heraldic devices of the knights at the time were left in place at the request of Queen Victoria . 
