If it's any help, I have a friend who goes to Ohio State for a PhD in English (Focusing on poetry I think?). He really loves it there and it was his first choice of schools. Rejection sucks, but to be accepted anywhere at all shows that there are people out there that think you're ready for the rigors of their program. The way I see it, a PhD is a PhD. I'm while I'm not too familiar with Art History programs, I know in my field at least, graduate school is not your last chance to go to a prestigious school. One of my interviewers said it best I think: "It sucks being a graduate student at Harvard anyway, but if you want the name on your resume, there's always a postdoc." If you do good work, I don't think it matters so much where you go. You'll be recognized more for what you did while you were there.
But then again, if the shoe doesn't fit, it's probably not a great idea to wear it for 5+ years. With tough decisions ahead for all of us, I wish you the best in making the one that's right for you.