Friedrich Karl Joseph von Erthal
| Friedrich Karl Joseph von Erthal | |
|---|---|
Portrait by Georg Anton Abraham Urlaub, 1786 | |
| Elector of Mainz | |
| Reign | 18 July 1774 – 4 July 1802 |
| Predecessor | Emmerich Joseph von Breidbach zu Bürresheim |
| Successor | Karl Theodor von Dalberg |
| Born | 3 January 1719 Lohr am Main |
| Died | 25 July 1802 (aged 83) Aschaffenburg |
| Burial | |
| Archbishop of Mainz | |
| Church | Catholic Church |
| Archdiocese | Mainz |
| In office | 18 July 1774 – 4 July 1802 |
| Predecessor | Emmerich Joseph von Breidbach zu Bürresheim |
| Successor | Karl Theodor von Dalberg |
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.