I'm sure that over the past eons, many artists or artist-wannabees have used it as "an example" to copy.
Sort of like the Bob Ross paintings. Many of Bob's works have been used as examples to learn the skill.
Legally, I see nothing wrong with it. Frame it and hang it on your wall. (if that's what you want to do).
Thank you, this was found in my parents closet but it originally belonged to my grandparents and they brought it with them from Italy when them immigrated to the US, they removed the wood frame in order to transport it. I'm trying to figure out how old it is, since it was hung in my grandparents home in Italy before coming to the US would make it quite an old rendition.