Harvard University, Cambridge, MA
Focus: History of Modern Art, 20th Century, 3-D animation and motion capture

Just wondering if the above focus is possible, and if you can get a PHD in it.

Yes,the Arts in Education (AIE) Program at Harvard Graduate School of Education (HGSE) is intended for self-directed individuals who are interested in fashioning their own arts-related courses of study.
Good luck on getting into it!:)