The United States five-dollar bill is a denomination of United States currency. The current $5 bill features the 16th U.S. President, Abraham Lincoln's portrait on the front and the Lincoln Memorial on the back. All $5 bills issued today are Federal Reserve Notes. — The $5 bill is …
Mathew Brady portrait of Lincoln taken on February 9, 1864, used for the current $5 bill.
Daguerreotype of Lincoln taken on the same February day by Mathew Brady, used for the redesigned $5 bills from 1999 onwards. Note that this image is a mirror of Lincoln as he appears on the bill - this is because the daguerreotype process produced a single positive image (rather than a negative made on film, which is then used to make a true photographic positive), and the daguerreotype was always a mirror image of the subject material. Thus, the way Lincoln appears on the bill is actually how he appeared when seated for the picture.
The reverse of the five-dollar bill has two rectangular strips that are blanked out when viewed in the infrared spectrum, as seen in this image taken by an infrared camera.