150th Anniversary of The Gettysburg Address

November 19, 2013 marks the 150th Anniversary of President Lincoln’s Gettysburg Address.

The Library of Congress has many resources concerning the event, including digital scans of a letter inviting President Lincoln to the dedication ceremony and two drafts of the address itself.
If you happen to be in Washington, D.C. before January 4th, you can see the Nicolay copy of the address at the Library of Congress.

The Google Cultural Institute has three excellent online exhibits on The Gettysburg Address if you are looking for not only images but background information as well.