The name of the nobleman escapes me but there was once a Prince-Bishop who as a Catholic Cleric was committed to Clerical Celibacy but as he was in charge of some small minor German speaking state (this was well before Lutheranism) but when his I believe father died he became the ruler of the Principality and due to heredity and maintaining the power of that position the Pope actually released him from Bishop duites and allowed him to marry so that he could rule his state, marry and produce an heir which he did. Technically he didn't jeopardize his position in so much that fate forced him into the position of being a ruling Prince. If memory serves me he wasn't the original ruling Prince's first son I believe he was the third son which is why he originally chose a career in the Church.