Although teaching and museum/gallery work seem to be the most popular career routes, art history majors are not limited to these paths, as an article by Charles M. Rosenberg, “Alternatives for Art Historians,” discusses. Another informative resources is the Art History page from What Can I Do With This Major?
I wrote this post, Why Choose Art History?, for current art history students and prospective art history students alike to be able to get a taste of what they can expect to do with their degree (undergraduate or advanced). It’s not definitive, but hopefully it will get you thinking about the different career options available to you. You can also read Q&A from current art history students on my For Undergrads page.