Which kind of oil painting worth to be taked back in France?

You are being asked to buy an oil painting for your mother while in France? I not happily recall purchasing two expensive gifts for others while on an international trip. We thought the items were beautiful and would be highly prized. Nope. Hopefully, you can be more successful than our failed effort and your purchase meets your mother's tastes in art. Best wishes.

Art, like beauty, is in the eye of the beholder. Buying a piece of art for someone else is like buying lingerie for your girlfriend - risky. Very risky. The only thing you should buy is something that you are very certain she would enjoy looking at. If you don't know what really appeals to her, then don't do it.

I'd agree with both posters above: someone else's idea of what constitutes "good" art may be very different than my own. I'd never buy art for someone else unless it was a specific work/artist I knew that they liked. From personal experience, it's really awkward to have been been gifted a piece of art - especially a large one - that you don't like and would never have purchased yourself but feel stuck having to display lest you upset the well-meaning giver.

I'll also gently disagree with your mom that "best" oil paintings are only found in France. Accomplished painters can be found everywhere in the world.

Anything that you like and can afford. Over the years we have bought an number of street art pieces that we enjoy today even thought the cost of framing was substantially greater than the cost of the art work. These pieces always remind us of where we were when they were purchase. We have no expectation that these pieces will be worth a million dollars in fifty years but our sons will fight over them.

Thank you for your all suggestion. I agree that someone else's idea of what constitutes "good" art may be very different than my own. In fact, compared to oil painting is beautiful or not, my mother more concerned that who bought it. Although beauty is not important, but I still want to try to choose a beautiful oil painting.

Good luck with this one! I don't know what price range you have in mind, or what size painting. My advice would be to try to buy a painting directly from the artist, maybe an artist with a nice display of paintings for sale in a public lace, like a park, then be sure to take a photo of the artist together with his or her painting, and maybe another with you in the photo as well. For your mom, your thoughtfulness and your experience may well be as valuable as the painting itself!