Which events created the mindset and prepared the policy of the later-to-be Pope Pius XII? This study takes into account the recently declassified documents in the Vatican Archives dealing with the Catholic Church's policy regarding Germany in the 1920s and 1930s, strongly defined by Nuncio in Germany and, then, Cardinal State Secretary Eugenio Pacelli (later to become Pope Pius XII). It broadens its view to cover also the Vatican's stance towards other European dictatorships of that time, such as Fascist Italy, Franquist Spain, Salazar's Portugal, and the Dollfuss regime in Austria.