catholic-hierarchy.orgUnited Nations Office and Specialized Agencies in Vienna (Nunciature) [Catholic-Hierarchy]️David M. Cheney Bishop(s) Richard Allen Gyhra, Permanent Observer Dominique Rézeau, Permanent Observer Emeritus General Information Type of Jurisdiction: Nunciature Diplomatic Post Mailing Address: Theresianumgasse, 33/4, A-1040, Wien, Oesterreich Telephone: (43-1)505.85.01 Fax: 505.85.01.75