The tenth bishop, Dietrich von Wolfsau (1318–32), is mentioned in deeds as the first (honorific) prince-bishop; he was also secretary of the Habsburg duke Frederick the Handsome, and was present at the Battle of Mühldorf in 1322. Since the twenty-second bishop, Theobald Schweinbeck (1446–63), the bishops have borne without intermission the title of "Fürst" (prince).