Complex sentence: The influence of the electors grew in Germany as well, they inherited the formerly Swedish territories of Bremen and Verden in 1719, and as part of the German Mediatisation of 1803, the Electorate received the Prince-Bishopric of Osnabrück.
Split into simpler sentences: The influence of the electors in Germany grew also: they inherited the formerly Swedish territories of Bremen and Verden in 1719. As part of the German Mediatisation of 1803, the Electorate received the Prince-Bishopric of Osnabrück.