Claim: Roman Catholic Diocese of Mainz is known as the Latin rite of the Catholic church in Germany and was founded in 304.
Evidence: The Diocese of Mainz, historically known in English by its French name of Mayence is a Latin rite of the Catholic church in Germany. It was founded in 304, promoted in 780 to Metropolitan Archbishopric of Mainz and demoted back in 1802 to bishopric.