Government

Cultural Policies in Europe: Holy See
Data, facts, trends and summaries of current debates on cultural policy developments in the Vatican (Holy See). Includes an overview of its organization and decision-making process.
http://www.culturalpolicies.net/holysee.htm

The Roman Curia
About the Secretariat of State, Congregations, Tribunals, Pontifical Coucils, Synod of Bishops, Offices, Pontifical Commissions, Swiss Guard, Institutions Connected with the Holy See, Labour Office of the Apostolic See, and Pontifical Academies.
http://www.vatican.va/roman_curia/index.htm

US Law Library of Congress - Holy See (Vatican City)
Annotated compendium of online sources providing access to primary documents, legal commentary and general government information about specific jurisdictions and topics.
http://www.loc.gov/law/help/guide/nations/holysee.html

World Legal Information Institute - Holy See
Catalog and search facilities for over 500 databases from 55 countries including case-law, legislation, treaties, law reform reports, law journals, and other materials.
http://www.worldlii.org/catalog/2779.html