Hi, I don't know where should I ask on using Public Domain artwork, so here I posts.
I work for a publishing company in South Korea and we are now planning to publish an art textbook for kids, and want to add a piece of image Athenaeum site has. It's The Holy Family with the infant Saint John the Baptist in a landscape by Orazio Gentileschi. (http://www.the-athenaeum.org/art/detail.php?ID=39932)
We usually do copy-right related job through Getty Images Korea, but they said they don't have this one and instead introduced us this site. This painting is also PD in South Korea according to our nation's law, then can it be OK to use this image with our work? (I already saw the comments below the painting which saids that The Athenaeum lists an artwork as public domain in the United States. )
I already asked this to SACK, the organization which handles foreign artwork's rights in South Korea and they recommend us to use images with 'proper source' and it's better to check if Athenaeum has the image without legal problem.
Please excuse my poor english and let me know your opinion on this through