Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
Vintage photos of:
"President Abraham Lincoln delivered his Gettysburg Address at the dedication. Examination of the image in 2007 by members of the Center for Civil War Photography indicates that Lincoln may be visible in the crowd when viewed through magnification."-- Library of Congress Prints & Photographs Division
November 19, 1863. "Dedication of Monument at Gettysburg, Pennsylvania." Wet plate glass negative by Alexander Gardner. View full size.