 Mezzano Rondani and Casale were parts of the Duchy of Parma, while Mezzano Inferiore and Superiore were since the origins fiefs of the bishops of Parma, and for that reason their ancient names had the suffix "del Vescovo" (of the Bishop).They formed an independent state, where the Bishop had also his palace and a garrison.It was always a rural district, but due to its closeness to Lombard and the Modenese states was also interested from smuggling.