I like how it has full-size downloads and synopsis of the artists. They have one of the better mobile experiences. Include details on art whereabouts and an overview of each collector's collection. NGA is one of many museum websites. I've just been using the site more frequently.
There are a few museum databases where you can look at their art online. I can’t think of the specific Italian ones but I know there are quite a few The Getty museum in LA just added a bunch of stuff to theirs / opened it up (linked to it) Maybe search a museum or artist followed by Creative Commons or open content!
both amazing are museums, very thoughtful and informative. NMAAHC is probably the best history museum i’ve been to. the numerous ways they’ve arranged the exhibitions (some by location, some by subtopic, some like a timeline) i haven’t seen before and they’ve curated so many artifacts and the amount of information provided in the descriptions is very thorough so you will definitely leave having learned a lot. i went once for a field trip and later returned to finish the upper floors. NMAI i went to for the first time this year, i didn’t have time to see it all but i did go through the whole exhibit on treaties and i learned so much that i didn’t learn in u.s. history classes growing up
additionally, the art museums in DC are all really good
I‘ve been getting/downloading prints of paintings from this site since I was a teenager. you can download hi-res images of the paintings and use them for whatever you’d like. I used to use them as notebook covers because I didn’t like the original covers some of my notebooks for school had. now I just like scrolling on the website (another thing I love! scrolling through websites.) and looking at the paintings/drawings/photographs.