Great photos!
I know that in the 1808 statutes for the Danish Order of Dannebrog (when it was made into a multi-class order) it is specified that persons already awarded the Order of the Elephant (the other Danish order) or clergy is to wear the Grand Cross insignia around the neck.
However, paintings and (later) photos suggest that it was worn from a ribbon similar to the Commanders, i.e. not sash width. In 1912 the insignia for the Grand Cross was made identical to the Commander, so the only way to tell if a priest was a Grand Cross or a Commander was by the breast star.