This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Constantin Hansen by Kittendorff Aagaard B. Olsen. en Carl Christian Constantin Hansen Royal Library Copenhagen Axel Kittendorff Johan Aagaard and Bernhard Olsen Constantin Hansen Files from The Portrait Collection of the Danish Royal Library Engravings by Axel Kittendorff and Johan Aagaard PDold
Page 2023 Free-images.com. All images are Public Domain