What noble family was XXX part of?
Prince Clemens Wenceslaus of Saxony
Prince Clemens Wenceslaus of Saxony (German: Clemens Wenzeslaus von Sachsen) (28 September 1739 -- 27 July 1812) was a German prince from the House of Wettin and the Archbishop-Elector of Trier from 1768 until 1803, the Prince-Bishop of Freising from 1763 until 1768, the Prince-Bishop of Regensburg from 1763 until 1769, and the Prince-Bishop of Augsburg from 1768 until 1812.
House of Wettin