Security Patterns

On-going project to collect and organize envelope security patterns from around the world:



www.flickr.com/photos/josephking/sets/72157594547931731/

The Library of Congress

Flickr photostream of THE Library of Congress - the national library for the United States, based in Washington, DC. 3,115 photos from The Prints & Photographs Division which takes care of 14 million of the Library's pictures: