💡📝Jörg Knappen wrote on Mon, Nov 23, 2009 01:01 PM UTC:
The Teutonic Order did not have archchancellors. Their leaders are (they are still extant!) titled Hochmeister which is translated into english as grandmaster---not a name suited for a chess piece. The Holy Roman empire had three archchancellors, the most important of them was archchancellor of the germans. This post was filled by one of the 7 electors, the archbishop of Mainz. He was responsible (among other duties) for the organisation of the emperor's election and he substituted in emperor in the time of an interregnum (together with two vicars).
No, I have not been aware of the reference you mention, but now I know it and I shall build it into the notes when I revise the text.