Street View has 2,362 museums (including this one) which you can look at with a vive, oculus or daydream. Or do you want 3D scans?

https://artsandculture.google.com/theme/igKSKBBnEBSGKg

https://artsandculture.google.com/search/streetview?project=...

https://artsandculture.google.com/partner/van-gogh-museum

https://artsandculture.google.com/partner/palace-of-versaill... look at the https://en.wikipedia.org/wiki/Hall_of_Mirrors

There's a Daydream app for looking at paintings scanned by Google https://play.google.com/store/apps/details?id=com.google.vr..... You'll need the $100 headset and a Pixel or some other compatible phone.

Google's collection is large but nowhere near exhaustive. I think some paintings are over 100,000 pixels across. In my opinion virtual reality doesn't add much. It's blurry. If you have a good monitor the website is better

https://artsandculture.google.com/favorite/group/fAKyrWQ7SlX...

Wikimedia Commons has hundreds of scans for some artists

https://commons.wikimedia.org/wiki/Category:Paintings_by_art...