World Statesmen (http://www.worldstatesmen.org)
“World Statesmen is an attempt at a comprehensive and accurate list of the heads of state and heads of government ...” It offers a historical chronology going back to 1470. This site also lists the leaders of local, traditional, international, government and religious organizations. Searchable by leader or nation, offers a map of the country, audio and text versions of the national anthem, and the text of the national constitution.
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