Ancient Rhaetia (comprising parts of what are now southeastern Germany, Austria, and eastern Switzerland) became a Roman province in 15 B.C.E.
Muistne Reetia (mille alla kuulus osa praegusest Saksamaa kaguosast, Austriast ja Ida - Šveitsist) sai aastal 15 e.m.a. Rooma provintsiks.