National History Day Official Website

Arts and Humanities Data Service
Digital resources on the Arts and Humanities from Great Britain.

British Library

Discovers Web A listing of primary sources on exploration.

Global Gateway International division of the Library of Congress contains resources from around the world.

International Dunhuang Project Over 100,000 online primary sources on the Silk Road.

Global Gateway Repositories of Primary Sources
A listing of over 5250 websites describing holdings of manuscripts, archives, rare books, historical photographs, and other primary sources for the research scholar. Organized by country and state.

UNESCO/IFLA Directory of Digitized Collections
A listing of digitized collections by institution, material type, project and theme from around the world.