This image is a faithful reproduction of a two-dimensional work of art and thus not copyrightable in itself in the U.S. as per Bridgeman Art Library v. Corel Corp.;. the same is also true in many other countries. The original two-dimensional work shown in this image is free content
because: This image (or other media file) is in the public domain because its copyright has expired.
This applies to the United States, where Works published prior to 1978 were copyright protected for a maximum of 75 years. See Circular 1 "COPYRIGHT BASICS" PDF . Works published before 1923 (in this case ca. 1903) are now in the public domain.