While "move up close to your subject" was the first "rule" of photography I ever heard of (our dad used to say so to my sister and myself when we had our first cameras and tended to create frames with loads of space and a tiny subject in the middle), here I feel you did a little too much of a good thing. Without any context, these photos only speak to yourself (for you were there and saw the museum and its items with your own eyes, so you can add the necessary context from out of you memory), but they don't speak to other viewers. Well, that is a generalisation ... they don't speak to me, I should say (but I assume they don't speak to too many others, either, which could be wrong).
What I just said might not apply to the same extent to Photo 2 and I think it does to Photo 1, but then Photo 2 suffers from underexposure, which would be my point of critique on that one.
But I do applaud your not using flash for museum photography!!!