Look up images for "happy white woman" on google and other search engines.
Then look up "happy Asian/Black/Mexican woman" on google.
Also look up images for "European art" on google and other search engines.
Same with European art. The prefix "European" would only be added when the author of the picture tries to contrast it with something else, or push some agenda about "European art". Otherwise it would just be under "art".
Case in point with another term: look at "American scientists" and "white American scientist". The second one will have more results of black people. This is again, in my opinion, because the addition of "white" is mainly added by those who concentrate and write about things related to race.
Another case in point - try looking for "thin woman" and observe how the proportion of pictures with obesity in them is bigger compared to searching for "woman" only.