Map of the former département du Mont-Tonerre
Mont-Tonnerre is the name of a département of the First French Empire in present Germany. It is named after the highest point in the Rhenish Palatinate, the Donnersberg. It was the southernmost of four départements formed in 1798, when the west bank of the Rhine was annexed by France. Prior to the French occupation, its territory was divided between the Archbishopric of Mainz, the Bishopric of Speyer and the Electorate of the Palatinate. Its territory is part of the present German states of Rhineland-Palatinate and Saarland. Its capital was Mayence (Mainz). The département was subdivided into the following arrondissements and cantons:
- Mainz, cantons: Alzey, Bingen, Bechtheim, Ingelheim, Kirchheimbolanden, Mainz, Nieder-Olm, Oppenheim, Wöllstein and Wörrstadt.
- Kaiserslautern (Kayserslautern was during French rule), cantons: Göllheim, Kayserslautern, Lauterecken, Obermoschel, Otterberg, Rockenhausen, Winnweiler and Wolfstein.
- Speyer (Spire was during French rule), cantons: Bad Dürkheim, Edenkoben, Frankenthal, Germersheim, Grünstadt, Mutterstadt, Neustadt (Weinstraße), Pfeddersheim, Spire and Worms.
- Zweibrücken (Deux-Ponts was during French rule), cantons: Annweiler, Homburg, Hornbach, Landstuhl, Medelsheim, Pirmasens, Waldfischbach and Deux-Ponts.
After Napoleon was defeated in 1814, the département was divided between the Bavaria (Palatinate) and Hesse (around Mainz).
Coordinates: 50°00′00″N 8°16′00″E / 50°N 8.26667°E