Pontifical Biblical Commission
Tisserant held a number of offices in the Roman Curia. He served as Secretary of the Congregation for the Oriental Churches (1936-1959), as President of the Pontifical Biblical Commission (1938–1946) and as Prefect of the Congregation of Ceremonies (1951-1967). From 1957 to 1971, he served as Librarian and Archivist of the Holy Roman Church. Under Pius XII, Tisserant also headed a commission to investigate alleged abuses of appointments in the Order of Malta, which concluded that there was no wrongdoing.