prince-bishop
/ˌprɪnsˈbɪʃəp/Now chiefly historical
noun
A person holding the ranks of both bishop and prince; (especially in Germany) a person holding the temporal possessions and authority of a bishopric with princely or noble rank.
Origin
Early 18th century; earliest use found in German Rogue. From prince + bishop, probably after German Fürstbischof.