Bernardo Attolico
He served as the High Commissioner of the League of Nations at Danzig ( 1920-1921 ) , Italian ambassador to Brazil ( 1928–1930 ) , to the Soviet Union ( 1930–1935 ) , to Nazi Germany ( 1935–1940 ) as well as ambassador to the Holy See in Rome ( 1940–1942 ) . 
<triplet> Soviet Union <subj> Holy See <obj> diplomatic relation