To be clear, it is not what I would call a bad fit either. I just don’t think of it as a college which is particularly strong in either Art History or Chemistry, particularly given its general selectivity. This is distinct from, say, Columbia, which I know has an extremely well-regarded Art History department. Same with GW, but at a very different selectivity point.
Indeed, it looks like GW has around 20-25 Art History graduates per class, which is pretty good for such a major. Columbia has like 35-40 (although that may include Barnard). But Georgetown has around 5-10. So not an impossibility at Georgetown, just not a particularly popular program.
But that doesn’t mean I would discourage you from applying! Again, DC is a great city for both art and international connections. Georgetown is a great overall university. So there are lots of reasons you could choose Georgetown, and I think the academic fit could be good enough even if it wasn’t the best.