The National Park Service has the portrait of the mortally wounded Lincoln cleaned and restored for the first time in 35 years.

The painting, which depicts Lincoln being carried out of Ford’s Theatre in Washington after being shot by John Wilkes Booth, is believed to be the only one of the assassination done by an eyewitness, according to Laura Anderson, a National Park Service museum curator. Dim and ghostly, it captures the moment word of assassination reaches the crowd on the street, and a moment of celebration becomes one of disbelief.