1862. Allan Pinkerton, President Lincoln, and Maj. Gen. John A. McClernand at Antietam. (Photo: Photo colorization by Sanna Dullaway for TIME / Original image by Alexander Gardner / Library of Congress)
For this week’s issue of TIME, Sanna Dullaway digitally colorized archival images of America’s 16th president in hopes of bringing history to life.
See more photos here.