Answer: Pope Pius XI noticed that Russia and Germany did not have representative literature at the 1936 Catholic Press Exhibition. It is interesting that the Pope noticed Russia and Germany not being represented with their Communistic and Nazi ideologies saying: "To each nation, to each great people, to all the sons we possess among them, we now send from this place our sad greeting and our remembrance."

See also:
Greg Pirozzi, The 1936 Catholic Press Exhibition Issue, A Postal History Retrospective: Part I, Vatican Notes, Volume 64, Issue: 369, 2016, Pages 12-29
Greg Pirozzi, The 1936 Catholic Press Exhibition Issue, A Postal History Retrospective: Part II, Vatican Notes, Volume 64, Issue 370, 2016, Pages 28-37




Catholic Press Exhibition
Scott # 47-54 (1936)