It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
JOHNSON AndrewPresident BEP engraved portrait. Engraved BEP portrait of President Andrew Johnson Restoration by Godot The Bureau of Engraving and Printing Original file File WASHINGTON GeorgePresident BEP engraved portrait George Washington File ADAMS JohnPresident BEP engraved portrait John Adams File JEFFERSON ThomasPresident
Page 2017 Free-images.com. All images are Public Domain