Cold War: History, Cinema, and Design, 1945-1991:

Atomic Age Cinema
Wilson Center: Cold War International History Project
Atomic Archive
John F. Kennedy Presidential Library and Museum: The Cold War in Berlin
Nixon Presidential Library and Museum
The Ronald Reagan Presidential Foundation and Library

Berlin Wall:

History
Encyclopedia Brittanica: Berlin Wall
George Mason University: Freedom Without Walls
German Missions in the United States
Goethe Institut: German Cultural Events
Wikipedia: The Berlin Wall
Wikipedia: List of Berlin Wall Segments

Art
Berlin.de: The Berlin Wall
Berlin Wall Art
Berlin Wall Online
Tag Galaxy

Memorials
US Observation Post Point Alpha
Berlin Wall Memorial
Silent Heroes of the Cold War National Memorial
Monument to Cold War Victory

East German Documents:

 Trug und Schein: an exchange of letters

The organizers of this crowdsourcing history project want the readers to follow the letters of Hilde und Roland and discover the identities, the stories, and the histories of the protagonists for themselves. Feel free to start to write the histories or other analyses of the letters on the Wikis! On this site, the readers get to make the scholarship. The letters are currently available only in German.

Robert Havemann Gesellschaft e.V.:  Archiv der DDR-Opposition