"Convenzioni postali tra il Regno sardo ed i ducati di Modena e di Parma"

This procedure concerns the formalization of postal agreements between the Kingdom of Sardinia and the Duchies of Modena and Parma. These conventions were designed to regulate the exchange of mail and establish operational standards for postal services between these Italian states. The agreements primarily affected postal administrations and citizens sending correspondence across these borders, ensuring more reliable and structured communication channels.