1933    Vice-Chancellor of Germany Franz von Papen and Vatican Cardinal Eugenio Pacelli sign a concordat on behalf of their respective nations.

1958    Samuel Alphonsus Stritch is appointed Pro-Prefect of the Propagation of Faith and thus becomes the first American member of the Roman Curia.

1966    The Vatican announces the abolition of the ''Index Librorum Prohibitorum'' (index of prohibited books), which was originally instituted in 1557.