sentences:  During his regency in Trier, he reorganized the jurisdiction in the diocese and advanced the renovation of the Roman Moselle bridge and the cathedral.He became Archbishop-Elector of Mainz in 1729, giving up the position in Trier as the Pope had prohibited a merging of the two Archbishoprics.In Mainz, Franz Ludwig also started some administrative and judicial reforms as well as the construction of the Deutschhaus.