 The Reichskonkordat was an integral part of four concordats Pacelli concluded on behalf of the Vatican with German States . The state concordats were necessary because the German federalist Weimar constitution gave the German states authority in the area of education and culture and thus diminished the authority of the churches in these areas ; this diminution of church authority was a primary concern of the Vatican . As Bavarian Nuncio , Pacelli negotiated successfully with the Bavarian authorities in 1925 . He expected the concordat with Catholic Bavaria to be the model for the rest of Germany . Prussia showed interest in negotiations only after the Bavarian concordat . However , Pacelli obtained less favorable conditions for the Church in the Prussian concordat of 1929 , which excluded educational issues . A concordat with the German state of Baden was completed by Pacelli in 1932 , after he had moved to Rome . There he also negotiated a concordat with Austria in 1933 . A total of 16 concordats and treaties with European states had been concluded in the ten @-@ year period 1922 – 1932 . 
