"Friedrich Karl Joseph Reichsfreiherr von Erthal (3 January 1719 – 25 July 1802) was prince-elector and archbishop of Mainz from 18 July 1774 to 4 July 1802, shortly before the end of the archbishopric in the Reichsdeputationshauptschluss." - (en.wikipedia.org 15.11.2019)
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